void
nsHTMLSelectListAccessible::CacheOptSiblings(nsIContent *aParentContent)
{
  nsCOMPtr<nsIPresShell> presShell(do_QueryReferent(mWeakShell));
  PRUint32 numChildren = aParentContent->GetChildCount();
  for (PRUint32 count = 0; count < numChildren; count ++) {
    nsIContent *childContent = aParentContent->GetChildAt(count);
    if (!childContent->IsHTML()) {
      continue;
    }

    nsCOMPtr<nsIAtom> tag = childContent->Tag();
    if (tag == nsAccessibilityAtoms::option ||
        tag == nsAccessibilityAtoms::optgroup) {

      // Get an accessible for option or optgroup and cache it.
      nsRefPtr<nsAccessible> accessible =
        GetAccService()->GetOrCreateAccessible(childContent, presShell,
                                               mWeakShell);
      if (accessible)
        AppendChild(accessible);

      // Deep down into optgroup element.
      if (tag == nsAccessibilityAtoms::optgroup)
        CacheOptSiblings(childContent);
    }
  }
}
void
nsXFormsAccessible::CacheSelectChildren(nsIDOMNode *aContainerNode)
{
  nsCOMPtr<nsIDOMNode> container(aContainerNode);
  if (!container)
    container = do_QueryInterface(mContent);

  nsCOMPtr<nsIDOMNodeList> children;
  sXFormsService->GetSelectChildrenFor(container, getter_AddRefs(children));

  if (!children)
    return;

  nsCOMPtr<nsIPresShell> presShell(do_QueryReferent(mWeakShell));

  PRUint32 length = 0;
  children->GetLength(&length);

  for (PRUint32 index = 0; index < length; index++) {
    nsCOMPtr<nsIDOMNode> DOMChild;
    children->Item(index, getter_AddRefs(DOMChild));
    if (!DOMChild)
      continue;

    nsCOMPtr<nsIContent> child(do_QueryInterface(DOMChild));
    nsAccessible* accessible =
      GetAccService()->GetOrCreateAccessible(child, presShell, mWeakShell);
    if (!accessible)
      continue;

    AppendChild(accessible);
  }
}
示例#3
0
nsresult
nsHTMLTableAccessible::RemoveRowsOrColumnsFromSelection(PRInt32 aIndex,
                                                        PRUint32 aTarget,
                                                        PRBool aIsOuter)
{
  nsITableLayout *tableLayout = GetTableLayout();
  NS_ENSURE_STATE(tableLayout);

  nsCOMPtr<nsIPresShell> presShell(GetPresShell());
  nsRefPtr<nsFrameSelection> tableSelection =
    const_cast<nsFrameSelection*>(presShell->ConstFrameSelection());

  PRBool doUnselectRow = (aTarget == nsISelectionPrivate::TABLESELECTION_ROW);

  nsresult rv = NS_OK;
  PRInt32 count = 0;
  if (doUnselectRow)
    rv = GetColumnCount(&count);
  else
    rv = GetRowCount(&count);

  PRInt32 startRowIdx = doUnselectRow ? aIndex : 0;
  PRInt32 endRowIdx = doUnselectRow ? aIndex : count - 1;
  PRInt32 startColIdx = doUnselectRow ? 0 : aIndex;
  PRInt32 endColIdx = doUnselectRow ? count - 1 : aIndex;

  if (aIsOuter)
    return tableSelection->RestrictCellsToSelection(mContent,
                                                    startRowIdx, startColIdx, 
                                                    endRowIdx, endColIdx);

  return tableSelection->RemoveCellsFromSelection(mContent,
                                                  startRowIdx, startColIdx, 
                                                  endRowIdx, endColIdx);
}
示例#4
0
NS_IMETHODIMP
nsTypeAheadFind::IsRangeVisible(nsIDOMRange *aRange,
                                bool aMustBeInViewPort,
                                bool *aResult)
{
  // Jump through hoops to extract the docShell from the range.
  nsCOMPtr<nsIDOMNode> node;
  aRange->GetStartContainer(getter_AddRefs(node));
  nsCOMPtr<nsIDOMDocument> document;
  node->GetOwnerDocument(getter_AddRefs(document));
  nsCOMPtr<nsIDOMWindow> window;
  document->GetDefaultView(getter_AddRefs(window));
  nsCOMPtr<nsIWebNavigation> navNav (do_GetInterface(window));
  nsCOMPtr<nsIDocShell> docShell (do_GetInterface(navNav));

  // Set up the arguments needed to check if a range is visible.
  nsCOMPtr<nsIPresShell> presShell (docShell->GetPresShell());
  nsRefPtr<nsPresContext> presContext = presShell->GetPresContext();
  nsCOMPtr<nsIDOMRange> startPointRange = new nsRange(presShell->GetDocument());
  *aResult = IsRangeVisible(presShell, presContext, aRange,
                            aMustBeInViewPort, false,
                            getter_AddRefs(startPointRange),
                            nullptr);
  return NS_OK;
}
示例#5
0
/**
  * Possible states: focused, focusable, unavailable(disabled), offscreen
  */
nsresult
nsXULTabAccessible::GetStateInternal(PRUint32 *aState, PRUint32 *aExtraState)
{
  // get focus and disable status from base class
  nsresult rv = nsLeafAccessible::GetStateInternal(aState, aExtraState);
  NS_ENSURE_A11Y_SUCCESS(rv, rv);

  // In the past, tabs have been focusable in classic theme
  // They may be again in the future
  // Check style for -moz-user-focus: normal to see if it's focusable
  *aState &= ~nsIAccessibleStates::STATE_FOCUSABLE;
  nsCOMPtr<nsIContent> content(do_QueryInterface(mDOMNode));
  nsCOMPtr<nsIPresShell> presShell(do_QueryReferent(mWeakShell));
  if (presShell && content) {
    nsIFrame *frame = presShell->GetPrimaryFrameFor(content);
    if (frame) {
      const nsStyleUserInterface* ui = frame->GetStyleUserInterface();
      if (ui->mUserFocus == NS_STYLE_USER_FOCUS_NORMAL)
        *aState |= nsIAccessibleStates::STATE_FOCUSABLE;
    }
  }
  // Check whether the tab is selected
  *aState |= nsIAccessibleStates::STATE_SELECTABLE;
  *aState &= ~nsIAccessibleStates::STATE_SELECTED;
  nsCOMPtr<nsIDOMXULSelectControlItemElement> tab(do_QueryInterface(mDOMNode));
  if (tab) {
    PRBool selected = PR_FALSE;
    if (NS_SUCCEEDED(tab->GetSelected(&selected)) && selected)
      *aState |= nsIAccessibleStates::STATE_SELECTED;
  }
  return NS_OK;
}
示例#6
0
// nsAccessNode protected
nsPresContext* nsAccessNode::GetPresContext()
{
  nsCOMPtr<nsIPresShell> presShell(GetPresShell());
  if (!presShell) {
    return nsnull;
  }
  return presShell->GetPresContext();
}
NS_IMETHODIMP nsHTMLSelectOptionAccessible::DoAction(PRUint8 index)
{
  if (index == eAction_Select) {   // default action
    nsCOMPtr<nsIDOMHTMLOptionElement> newHTMLOption(do_QueryInterface(mDOMNode));
    if (!newHTMLOption) 
      return NS_ERROR_FAILURE;
    // Clear old selection
    nsCOMPtr<nsIDOMNode> oldHTMLOptionNode, selectNode;
    nsCOMPtr<nsIAccessible> parent(GetParent());
    nsCOMPtr<nsIAccessNode> accessNode(do_QueryInterface(parent));
    NS_ASSERTION(accessNode, "Unable to QI to nsIAccessNode");
    accessNode->GetDOMNode(getter_AddRefs(selectNode));
    GetFocusedOptionNode(selectNode, getter_AddRefs(oldHTMLOptionNode));
    nsCOMPtr<nsIDOMHTMLOptionElement> oldHTMLOption(do_QueryInterface(oldHTMLOptionNode));
    if (oldHTMLOption)
      oldHTMLOption->SetSelected(PR_FALSE);
    // Set new selection
    newHTMLOption->SetSelected(PR_TRUE);

    // If combo box, and open, close it
    // First, get the <select> widgets list control frame
    nsCOMPtr<nsIDOMNode> testSelectNode;
    nsCOMPtr<nsIDOMNode> thisNode(do_QueryInterface(mDOMNode));
    do {
      thisNode->GetParentNode(getter_AddRefs(testSelectNode));
      nsCOMPtr<nsIDOMHTMLSelectElement> selectControl(do_QueryInterface(testSelectNode));
      if (selectControl)
        break;
      thisNode = testSelectNode;
    } while (testSelectNode);

    nsCOMPtr<nsIPresShell> presShell(do_QueryReferent(mWeakShell));
    nsCOMPtr<nsIContent> selectContent(do_QueryInterface(testSelectNode));
    nsCOMPtr<nsIDOMHTMLOptionElement> option(do_QueryInterface(mDOMNode));

    if (!testSelectNode || !selectContent || !presShell || !option) 
      return NS_ERROR_FAILURE;

    nsIFrame *selectFrame = presShell->GetPrimaryFrameFor(selectContent);
    nsIComboboxControlFrame *comboBoxFrame = do_QueryFrame(selectFrame);
    if (comboBoxFrame) {
      nsIFrame *listFrame = comboBoxFrame->GetDropDown();
      if (comboBoxFrame->IsDroppedDown() && listFrame) {
        // use this list control frame to roll up the list
        nsIListControlFrame *listControlFrame = do_QueryFrame(listFrame);
        if (listControlFrame) {
          PRInt32 newIndex = 0;
          option->GetIndex(&newIndex);
          listControlFrame->ComboboxFinish(newIndex);
        }
      }
    }
    return NS_OK;
  }

  return NS_ERROR_INVALID_ARG;
}
示例#8
0
// nsAccessNode protected
nsPresContext* nsAccessNode::GetPresContext()
{
  if (IsDefunct())
    return nsnull;

  nsIPresShell* presShell(mDoc->PresShell());

  return presShell ? presShell->GetPresContext() : nsnull;
}
NS_IMETHODIMP nsHTMLSelectOptionAccessible::DoAction(PRUint8 index)
{
  if (index == eAction_Select) {   // default action
    nsCOMPtr<nsIDOMHTMLOptionElement> newHTMLOption(do_QueryInterface(mContent));
    if (!newHTMLOption) 
      return NS_ERROR_FAILURE;
    // Clear old selection
    nsAccessible* parent = GetParent();
    NS_ASSERTION(parent, "No parent!");

    nsCOMPtr<nsIContent> oldHTMLOptionContent =
      GetFocusedOption(parent->GetContent());
    nsCOMPtr<nsIDOMHTMLOptionElement> oldHTMLOption =
      do_QueryInterface(oldHTMLOptionContent);
    if (oldHTMLOption)
      oldHTMLOption->SetSelected(PR_FALSE);
    // Set new selection
    newHTMLOption->SetSelected(PR_TRUE);

    // If combo box, and open, close it
    // First, get the <select> widgets list control frame
    nsIContent *selectContent = mContent;
    do {
      selectContent = selectContent->GetParent();
      nsCOMPtr<nsIDOMHTMLSelectElement> selectControl =
        do_QueryInterface(selectContent);
      if (selectControl)
        break;

    } while (selectContent);

    nsCOMPtr<nsIPresShell> presShell(do_QueryReferent(mWeakShell));
    nsCOMPtr<nsIDOMHTMLOptionElement> option(do_QueryInterface(mContent));

    if (!selectContent || !presShell || !option)
      return NS_ERROR_FAILURE;

    nsIFrame *selectFrame = selectContent->GetPrimaryFrame();
    nsIComboboxControlFrame *comboBoxFrame = do_QueryFrame(selectFrame);
    if (comboBoxFrame) {
      nsIFrame *listFrame = comboBoxFrame->GetDropDown();
      if (comboBoxFrame->IsDroppedDown() && listFrame) {
        // use this list control frame to roll up the list
        nsIListControlFrame *listControlFrame = do_QueryFrame(listFrame);
        if (listControlFrame) {
          PRInt32 newIndex = 0;
          option->GetIndex(&newIndex);
          listControlFrame->ComboboxFinish(newIndex);
        }
      }
    }
    return NS_OK;
  }

  return NS_ERROR_INVALID_ARG;
}
示例#10
0
nsIFrame* nsHTMLSelectOptionAccessible::GetBoundsFrame()
{
  PRUint32 state;
  nsCOMPtr<nsIContent> content = GetSelectState(&state);
  if (state & nsIAccessibleStates::STATE_COLLAPSED) {
    nsCOMPtr<nsIPresShell> presShell(GetPresShell());
    if (!presShell) {
      return nsnull;
    }
    return presShell->GetPrimaryFrameFor(content);
  }

  return nsAccessible::GetBoundsFrame();
}
示例#11
0
NS_IMETHODIMP
nsHTMLLinkAccessible::GetValue(nsAString& aValue)
{
  aValue.Truncate();

  nsresult rv = nsHyperTextAccessible::GetValue(aValue);
  NS_ENSURE_SUCCESS(rv, rv);

  if (!aValue.IsEmpty())
    return NS_OK;
  
  nsCOMPtr<nsIPresShell> presShell(do_QueryReferent(mWeakShell));
  nsCOMPtr<nsIDOMNode> DOMNode(do_QueryInterface(mContent));
  return presShell->GetLinkLocation(DOMNode, aValue);
}
示例#12
0
/**
 * If the DOM node's frame has an accessible or the DOMNode
 * itself implements nsIAccessible return it.
 */
PRBool nsAccessibleTreeWalker::GetAccessible()
{
  if (!mAccService) {
    return false;
  }
  mState.accessible = nsnull;
  nsCOMPtr<nsIPresShell> presShell(do_QueryReferent(mWeakShell));

  if (NS_SUCCEEDED(mAccService->GetAccessible(mState.domNode, presShell, mWeakShell, 
                                              &mState.frame, &mState.isHidden,
                                              getter_AddRefs(mState.accessible)))) {
    NS_ASSERTION(mState.accessible, "No accessible but no failure return code");
    return true;
  }
  return false;
}
示例#13
0
/**
 * If the DOM node's frame has an accessible or the DOMNode
 * itself implements nsIAccessible return it.
 */
PRBool nsAccessibleTreeWalker::GetAccessible()
{
  if (!mAccService) {
    return PR_FALSE;
  }

  mState.accessible = nsnull;
  nsCOMPtr<nsIPresShell> presShell(do_QueryReferent(mWeakShell));

  nsIFrame *frame = mState.frame.GetFrame();
  mAccService->GetAccessible(mState.domNode, presShell, mWeakShell,
                             &frame, &mState.isHidden,
                             getter_AddRefs(mState.accessible));
  mState.frame = frame;
  return mState.accessible ? PR_TRUE : PR_FALSE;
}
示例#14
0
nsresult
nsHTMLTableAccessible::AddRowOrColumnToSelection(PRInt32 aIndex,
                                                 PRUint32 aTarget)
{
  PRBool doSelectRow = (aTarget == nsISelectionPrivate::TABLESELECTION_ROW);

  nsITableLayout *tableLayout = GetTableLayout();
  NS_ENSURE_STATE(tableLayout);

  nsCOMPtr<nsIDOMElement> cellElm;
  PRInt32 startRowIdx, startColIdx, rowSpan, colSpan,
    actualRowSpan, actualColSpan;
  PRBool isSelected = PR_FALSE;

  nsresult rv = NS_OK;
  PRInt32 count = 0;
  if (doSelectRow)
    rv = GetColumnCount(&count);
  else
    rv = GetRowCount(&count);

  NS_ENSURE_SUCCESS(rv, rv);

  nsCOMPtr<nsIPresShell> presShell(GetPresShell());
  nsRefPtr<nsFrameSelection> tableSelection =
    const_cast<nsFrameSelection*>(presShell->ConstFrameSelection());

  for (PRInt32 idx = 0; idx < count; idx++) {
    PRInt32 rowIdx = doSelectRow ? aIndex : idx;
    PRInt32 colIdx = doSelectRow ? idx : aIndex;
    rv = tableLayout->GetCellDataAt(rowIdx, colIdx,
                                    *getter_AddRefs(cellElm),
                                    startRowIdx, startColIdx,
                                    rowSpan, colSpan,
                                    actualRowSpan, actualColSpan,
                                    isSelected);      

    if (NS_SUCCEEDED(rv) && !isSelected) {
      nsCOMPtr<nsIContent> cellContent(do_QueryInterface(cellElm));
      rv = tableSelection->SelectCellElement(cellContent);
      NS_ENSURE_SUCCESS(rv, rv);
    }
  }

  return NS_OK;
}
示例#15
0
nsAccessibleTreeWalker::nsAccessibleTreeWalker(nsIWeakReference* aPresShell, nsIDOMNode* aNode, PRBool aWalkAnonContent): 
  mWeakShell(aPresShell), 
  mAccService(do_GetService("@mozilla.org/accessibilityService;1"))
{
  mState.domNode = aNode;
  mState.prevState = nsnull;
  mState.siblingIndex = eSiblingsUninitialized;
  mState.siblingList = nsnull;
  mState.isHidden = false;
  mState.frame = nsnull;

  if (aWalkAnonContent) {
    nsCOMPtr<nsIPresShell> presShell(do_QueryReferent(mWeakShell));
    if (presShell)
      mBindingManager = presShell->GetDocument()->BindingManager();
  }
  MOZ_COUNT_CTOR(nsAccessibleTreeWalker);
}
示例#16
0
already_AddRefed<nsAccessible>
nsAccTreeWalker::GetNextChildInternal(PRBool aNoWalkUp)
{
  if (!mState || !mState->content)
    return nsnull;

  if (!mState->childList)
    mState->childList = mState->content->GetChildren(mChildType);

  nsCOMPtr<nsIPresShell> presShell(do_QueryReferent(mWeakShell));

  PRUint32 length = 0;
  if (mState->childList)
    mState->childList->GetLength(&length);

  while (mState->childIdx < length) {
    nsIContent* childNode = mState->childList->GetNodeAt(mState->childIdx);
    mState->childIdx++;

    PRBool isHidden = PR_FALSE;
    nsRefPtr<nsAccessible> accessible =
      GetAccService()->GetOrCreateAccessible(childNode, presShell, mWeakShell,
                                             &isHidden);

    if (accessible)
      return accessible.forget();

    // Walk down into subtree to find accessibles.
    if (!isHidden) {
      if (!PushState(childNode))
        break;

      accessible = GetNextChildInternal(PR_TRUE);
      if (accessible)
        return accessible.forget();
    }
  }

  // No more children, get back to the parent.
  PopState();

  return aNoWalkUp ? nsnull : GetNextChildInternal(PR_FALSE);
}
nsAccessible*
nsAccTreeWalker::NextChildInternal(bool aNoWalkUp)
{
  if (!mState || !mState->content)
    return nsnull;

  if (!mState->childList)
    mState->childList = mState->content->GetChildren(mChildFilter);

  nsCOMPtr<nsIPresShell> presShell(do_QueryReferent(mWeakShell));

  PRUint32 length = 0;
  if (mState->childList)
    mState->childList->GetLength(&length);

  while (mState->childIdx < length) {
    nsIContent* childNode = mState->childList->GetNodeAt(mState->childIdx);
    mState->childIdx++;

    bool isSubtreeHidden = false;
    nsAccessible* accessible =
      GetAccService()->GetOrCreateAccessible(childNode, presShell, mWeakShell,
                                             &isSubtreeHidden);

    if (accessible)
      return accessible;

    // Walk down into subtree to find accessibles.
    if (!isSubtreeHidden) {
      if (!PushState(childNode))
        break;

      accessible = NextChildInternal(true);
      if (accessible)
        return accessible;
    }
  }

  // No more children, get back to the parent.
  PopState();

  return aNoWalkUp ? nsnull : NextChildInternal(false);
}
示例#18
0
NS_IMETHODIMP
nsTypeAheadFind::Find(const nsAString& aSearchString, bool aLinksOnly,
                      uint16_t* aResult)
{
  *aResult = FIND_NOTFOUND;

  nsCOMPtr<nsIPresShell> presShell (GetPresShell());
  if (!presShell) {
    nsCOMPtr<nsIDocShell> ds (do_QueryReferent(mDocShell));
    NS_ENSURE_TRUE(ds, NS_ERROR_FAILURE);

    presShell = ds->GetPresShell();
    NS_ENSURE_TRUE(presShell, NS_ERROR_FAILURE);
    mPresShell = do_GetWeakReference(presShell);
  }

  nsCOMPtr<nsISelection> selection;
  nsCOMPtr<nsISelectionController> selectionController =
    do_QueryReferent(mSelectionController);
  if (!selectionController) {
    GetSelection(presShell, getter_AddRefs(selectionController),
                 getter_AddRefs(selection)); // cache for reuse
    mSelectionController = do_GetWeakReference(selectionController);
  } else {
    selectionController->GetSelection(
      nsISelectionController::SELECTION_NORMAL, getter_AddRefs(selection));
  }

  if (selection)
    selection->CollapseToStart();

  if (aSearchString.IsEmpty()) {
    mTypeAheadBuffer.Truncate();

    // These will be initialized to their true values after the first character
    // is typed
    mStartFindRange = nullptr;
    mSelectionController = nullptr;

    *aResult = FIND_FOUND;
    return NS_OK;
  }

  bool atEnd = false;    
  if (mTypeAheadBuffer.Length()) {
    const nsAString& oldStr = Substring(mTypeAheadBuffer, 0, mTypeAheadBuffer.Length());
    const nsAString& newStr = Substring(aSearchString, 0, mTypeAheadBuffer.Length());
    if (oldStr.Equals(newStr))
      atEnd = true;
  
    const nsAString& newStr2 = Substring(aSearchString, 0, aSearchString.Length());
    const nsAString& oldStr2 = Substring(mTypeAheadBuffer, 0, aSearchString.Length());
    if (oldStr2.Equals(newStr2))
      atEnd = true;
    
    if (!atEnd)
      mStartFindRange = nullptr;
  }

  if (!mIsSoundInitialized && !mNotFoundSoundURL.IsEmpty()) {
    // This makes sure system sound library is loaded so that
    // there's no lag before the first sound is played
    // by waiting for the first keystroke, we still get the startup time benefits.
    mIsSoundInitialized = true;
    mSoundInterface = do_CreateInstance("@mozilla.org/sound;1");
    if (mSoundInterface && !mNotFoundSoundURL.EqualsLiteral("beep")) {
      mSoundInterface->Init();
    }
  }

#ifdef XP_WIN
  // After each keystroke, ensure sound object is destroyed, to free up memory 
  // allocated for error sound, otherwise Windows' nsISound impl 
  // holds onto the last played sound, using up memory.
  mSoundInterface = nullptr;
#endif

  int32_t bufferLength = mTypeAheadBuffer.Length();

  mTypeAheadBuffer = aSearchString;

  bool isFirstVisiblePreferred = false;

  // --------- Initialize find if 1st char ----------
  if (bufferLength == 0) {
    // If you can see the selection (not collapsed or thru caret browsing),
    // or if already focused on a page element, start there.
    // Otherwise we're going to start at the first visible element
    bool isSelectionCollapsed = true;
    if (selection)
      selection->GetIsCollapsed(&isSelectionCollapsed);

    // If true, we will scan from top left of visible area
    // If false, we will scan from start of selection
    isFirstVisiblePreferred = !atEnd && !mCaretBrowsingOn && isSelectionCollapsed;
    if (isFirstVisiblePreferred) {
      // Get the focused content. If there is a focused node, ensure the
      // selection is at that point. Otherwise, we will just want to start
      // from the caret position or the beginning of the document.
      nsPresContext* presContext = presShell->GetPresContext();
      NS_ENSURE_TRUE(presContext, NS_OK);

      nsCOMPtr<nsIDocument> document =
        do_QueryInterface(presShell->GetDocument());
      if (!document)
        return NS_ERROR_UNEXPECTED;

      nsCOMPtr<nsIDOMWindow> window = do_QueryInterface(document->GetWindow());

      nsCOMPtr<nsIFocusManager> fm = do_GetService(FOCUSMANAGER_CONTRACTID);
      if (fm) {
        nsCOMPtr<nsIDOMElement> focusedElement;
        nsCOMPtr<nsIDOMWindow> focusedWindow;
        fm->GetFocusedElementForWindow(window, false, getter_AddRefs(focusedWindow),
                                       getter_AddRefs(focusedElement));
        // If the root element is focused, then it's actually the document
        // that has the focus, so ignore this.
        if (focusedElement &&
            !SameCOMIdentity(focusedElement, document->GetRootElement())) {
          fm->MoveCaretToFocus(window);
          isFirstVisiblePreferred = false;
        }
      }
    }
  }

  // ----------- Find the text! ---------------------
  // Beware! This may flush notifications via synchronous
  // ScrollSelectionIntoView.
  nsresult rv = FindItNow(nullptr, aLinksOnly, isFirstVisiblePreferred,
                          false, aResult);

  // ---------Handle success or failure ---------------
  if (NS_SUCCEEDED(rv)) {
    if (mTypeAheadBuffer.Length() == 1) {
      // If first letter, store where the first find succeeded
      // (mStartFindRange)

      mStartFindRange = nullptr;
      if (selection) {
        nsCOMPtr<nsIDOMRange> startFindRange;
        selection->GetRangeAt(0, getter_AddRefs(startFindRange));
        if (startFindRange)
          startFindRange->CloneRange(getter_AddRefs(mStartFindRange));
      }
    }
  }
  else {
    // Error sound
    if (mTypeAheadBuffer.Length() > mLastFindLength)
      PlayNotFoundSound();
  }

  SaveFind();
  return NS_OK;
}
示例#19
0
nsresult
nsTypeAheadFind::FindItNow(nsIPresShell *aPresShell, bool aIsLinksOnly,
                           bool aIsFirstVisiblePreferred, bool aFindPrev,
                           uint16_t* aResult)
{
  *aResult = FIND_NOTFOUND;
  mFoundLink = nullptr;
  mFoundEditable = nullptr;
  mFoundRange = nullptr;
  mCurrentWindow = nullptr;
  nsCOMPtr<nsIPresShell> startingPresShell (GetPresShell());
  if (!startingPresShell) {    
    nsCOMPtr<nsIDocShell> ds = do_QueryReferent(mDocShell);
    NS_ENSURE_TRUE(ds, NS_ERROR_FAILURE);

    startingPresShell = ds->GetPresShell();
    mPresShell = do_GetWeakReference(startingPresShell);    
  }  

  nsCOMPtr<nsIPresShell> presShell(aPresShell);

  if (!presShell) {
    presShell = startingPresShell;  // this is the current document

    if (!presShell)
      return NS_ERROR_FAILURE;
  }

  nsRefPtr<nsPresContext> presContext = presShell->GetPresContext();

  if (!presContext)
    return NS_ERROR_FAILURE;

  nsCOMPtr<nsISelection> selection;
  nsCOMPtr<nsISelectionController> selectionController = 
    do_QueryReferent(mSelectionController);
  if (!selectionController) {
    GetSelection(presShell, getter_AddRefs(selectionController),
                 getter_AddRefs(selection)); // cache for reuse
    mSelectionController = do_GetWeakReference(selectionController);
  } else {
    selectionController->GetSelection(
      nsISelectionController::SELECTION_NORMAL, getter_AddRefs(selection));
  }
 
  nsCOMPtr<nsIDocShell> startingDocShell(presContext->GetDocShell());
  NS_ASSERTION(startingDocShell, "Bug 175321 Crashes with Type Ahead Find [@ nsTypeAheadFind::FindItNow]");
  if (!startingDocShell)
    return NS_ERROR_FAILURE;

  nsCOMPtr<nsIDocShellTreeItem> rootContentTreeItem;
  nsCOMPtr<nsIDocShell> currentDocShell;

  startingDocShell->GetSameTypeRootTreeItem(getter_AddRefs(rootContentTreeItem));
  nsCOMPtr<nsIDocShell> rootContentDocShell =
    do_QueryInterface(rootContentTreeItem);

  if (!rootContentDocShell)
    return NS_ERROR_FAILURE;

  nsCOMPtr<nsISimpleEnumerator> docShellEnumerator;
  rootContentDocShell->GetDocShellEnumerator(nsIDocShellTreeItem::typeContent,
                                             nsIDocShell::ENUMERATE_FORWARDS,
                                             getter_AddRefs(docShellEnumerator));

  // Default: can start at the current document
  nsCOMPtr<nsISupports> currentContainer =
    do_QueryInterface(rootContentDocShell);

  // Iterate up to current shell, if there's more than 1 that we're
  // dealing with
  bool hasMoreDocShells;

  while (NS_SUCCEEDED(docShellEnumerator->HasMoreElements(&hasMoreDocShells)) && hasMoreDocShells) {
    docShellEnumerator->GetNext(getter_AddRefs(currentContainer));
    currentDocShell = do_QueryInterface(currentContainer);
    if (!currentDocShell || currentDocShell == startingDocShell || aIsFirstVisiblePreferred)
      break;    
  }

  // ------------ Get ranges ready ----------------
  nsCOMPtr<nsIDOMRange> returnRange;
  nsCOMPtr<nsIPresShell> focusedPS;
  if (NS_FAILED(GetSearchContainers(currentContainer,
                                    (!aIsFirstVisiblePreferred ||
                                     mStartFindRange) ?
                                    selectionController.get() : nullptr,
                                    aIsFirstVisiblePreferred,  aFindPrev,
                                    getter_AddRefs(presShell),
                                    getter_AddRefs(presContext)))) {
    return NS_ERROR_FAILURE;
  }

  int16_t rangeCompareResult = 0;
  if (!mStartPointRange) {
    mStartPointRange = new nsRange(presShell->GetDocument());
  }

  mStartPointRange->CompareBoundaryPoints(nsIDOMRange::START_TO_START, mSearchRange, &rangeCompareResult);
  // No need to wrap find in doc if starting at beginning
  bool hasWrapped = (rangeCompareResult < 0);

  if (mTypeAheadBuffer.IsEmpty() || !EnsureFind())
    return NS_ERROR_FAILURE;

  mFind->SetFindBackwards(aFindPrev);

  while (true) {    // ----- Outer while loop: go through all docs -----
    while (true) {  // === Inner while loop: go through a single doc ===
      mFind->Find(mTypeAheadBuffer.get(), mSearchRange, mStartPointRange,
                  mEndPointRange, getter_AddRefs(returnRange));
      
      if (!returnRange)
        break;  // Nothing found in this doc, go to outer loop (try next doc)

      // ------- Test resulting found range for success conditions ------
      bool isInsideLink = false, isStartingLink = false;

      if (aIsLinksOnly) {
        // Don't check if inside link when searching all text
        RangeStartsInsideLink(returnRange, presShell, &isInsideLink,
                              &isStartingLink);
      }

      bool usesIndependentSelection;
      if (!IsRangeVisible(presShell, presContext, returnRange,
                          aIsFirstVisiblePreferred, false,
                          getter_AddRefs(mStartPointRange), 
                          &usesIndependentSelection) ||
          (aIsLinksOnly && !isInsideLink) ||
          (mStartLinksOnlyPref && aIsLinksOnly && !isStartingLink)) {
        // ------ Failure ------
        // At this point mStartPointRange got updated to the first
        // visible range in the viewport.  We _may_ be able to just
        // start there, if it's not taking us in the wrong direction.
        if (aFindPrev) {
          // We can continue at the end of mStartPointRange if its end is before
          // the start of returnRange or coincides with it.  Otherwise, we need
          // to continue at the start of returnRange.
          int16_t compareResult;
          nsresult rv =
            mStartPointRange->CompareBoundaryPoints(nsIDOMRange::START_TO_END,
                                                    returnRange, &compareResult);
          if (NS_SUCCEEDED(rv) && compareResult <= 0) {
            // OK to start at the end of mStartPointRange
            mStartPointRange->Collapse(false);
          } else {
            // Start at the beginning of returnRange
            returnRange->CloneRange(getter_AddRefs(mStartPointRange));
            mStartPointRange->Collapse(true);
          }
        } else {
          // We can continue at the start of mStartPointRange if its start is
          // after the end of returnRange or coincides with it.  Otherwise, we
          // need to continue at the end of returnRange.
          int16_t compareResult;
          nsresult rv =
            mStartPointRange->CompareBoundaryPoints(nsIDOMRange::END_TO_START,
                                                    returnRange, &compareResult);
          if (NS_SUCCEEDED(rv) && compareResult >= 0) {
            // OK to start at the start of mStartPointRange
            mStartPointRange->Collapse(true);
          } else {
            // Start at the end of returnRange
            returnRange->CloneRange(getter_AddRefs(mStartPointRange));
            mStartPointRange->Collapse(false);
          }
        }
        continue;
      }

      mFoundRange = returnRange;

      // ------ Success! -------
      // Hide old selection (new one may be on a different controller)
      if (selection) {
        selection->CollapseToStart();
        SetSelectionModeAndRepaint(nsISelectionController::SELECTION_ON);
      }

      // Make sure new document is selected
      if (presShell != startingPresShell) {
        // We are in a new document (because of frames/iframes)
        mPresShell = do_GetWeakReference(presShell);
      }

      nsCOMPtr<nsIDocument> document =
        do_QueryInterface(presShell->GetDocument());
      NS_ASSERTION(document, "Wow, presShell doesn't have document!");
      if (!document)
        return NS_ERROR_UNEXPECTED;

      nsCOMPtr<nsPIDOMWindow> window = document->GetInnerWindow();
      NS_ASSERTION(window, "document has no window");
      if (!window)
        return NS_ERROR_UNEXPECTED;

      nsCOMPtr<nsIFocusManager> fm = do_GetService(FOCUSMANAGER_CONTRACTID);
      if (usesIndependentSelection) {
        /* If a search result is found inside an editable element, we'll focus
         * the element only if focus is in our content window, i.e.
         * |if (focusedWindow.top == ourWindow.top)| */
        bool shouldFocusEditableElement = false;
        if (fm) {
          nsCOMPtr<nsIDOMWindow> focusedWindow;
          nsresult rv = fm->GetFocusedWindow(getter_AddRefs(focusedWindow));
          if (NS_SUCCEEDED(rv)) {
            nsCOMPtr<nsPIDOMWindow> fwPI(do_QueryInterface(focusedWindow, &rv));
            if (NS_SUCCEEDED(rv)) {
              nsCOMPtr<nsIDocShellTreeItem> fwTreeItem
                (do_QueryInterface(fwPI->GetDocShell(), &rv));
              if (NS_SUCCEEDED(rv)) {
                nsCOMPtr<nsIDocShellTreeItem> fwRootTreeItem;
                rv = fwTreeItem->GetSameTypeRootTreeItem(getter_AddRefs(fwRootTreeItem));
                if (NS_SUCCEEDED(rv) && fwRootTreeItem == rootContentTreeItem)
                  shouldFocusEditableElement = true;
              }
            }
          }
        }

        // We may be inside an editable element, and therefore the selection
        // may be controlled by a different selection controller.  Walk up the
        // chain of parent nodes to see if we find one.
        nsCOMPtr<nsIDOMNode> node;
        returnRange->GetStartContainer(getter_AddRefs(node));
        while (node) {
          nsCOMPtr<nsIDOMNSEditableElement> editable = do_QueryInterface(node);
          if (editable) {
            // Inside an editable element.  Get the correct selection 
            // controller and selection.
            nsCOMPtr<nsIEditor> editor;
            editable->GetEditor(getter_AddRefs(editor));
            NS_ASSERTION(editor, "Editable element has no editor!");
            if (!editor) {
              break;
            }
            editor->GetSelectionController(
              getter_AddRefs(selectionController));
            if (selectionController) {
              selectionController->GetSelection(
                nsISelectionController::SELECTION_NORMAL, 
                getter_AddRefs(selection));
            }
            mFoundEditable = do_QueryInterface(node);

            if (!shouldFocusEditableElement)
              break;

            // Otherwise move focus/caret to editable element
            if (fm)
              fm->SetFocus(mFoundEditable, 0);
            break;
          }
          nsIDOMNode* tmp = node;
          tmp->GetParentNode(getter_AddRefs(node));
        }

        // If we reach here without setting mFoundEditable, then something
        // besides editable elements can cause us to have an independent
        // selection controller.  I don't know whether this is possible.
        // Currently, we simply fall back to grabbing the document's selection
        // controller in this case.  Perhaps we should reject this find match
        // and search again.
        NS_ASSERTION(mFoundEditable, "Independent selection controller on "
                     "non-editable element!");
      }

      if (!mFoundEditable) {
        // Not using a separate selection controller, so just get the
        // document's controller and selection.
        GetSelection(presShell, getter_AddRefs(selectionController), 
                     getter_AddRefs(selection));
      }
      mSelectionController = do_GetWeakReference(selectionController);

      // Select the found text
      if (selection) {
        selection->RemoveAllRanges();
        selection->AddRange(returnRange);
      }

      if (!mFoundEditable && fm) {
        nsCOMPtr<nsIDOMWindow> win = do_QueryInterface(window);
        fm->MoveFocus(win, nullptr, nsIFocusManager::MOVEFOCUS_CARET,
                      nsIFocusManager::FLAG_NOSCROLL | nsIFocusManager::FLAG_NOSWITCHFRAME,
                      getter_AddRefs(mFoundLink));
      }

      // Change selection color to ATTENTION and scroll to it.  Careful: we
      // must wait until after we goof with focus above before changing to
      // ATTENTION, or when we MoveFocus() and the selection is not on a
      // link, we'll blur, which will lose the ATTENTION.
      if (selectionController) {
        // Beware! This may flush notifications via synchronous
        // ScrollSelectionIntoView.
        SetSelectionModeAndRepaint(nsISelectionController::SELECTION_ATTENTION);
        selectionController->ScrollSelectionIntoView(
          nsISelectionController::SELECTION_NORMAL, 
          nsISelectionController::SELECTION_WHOLE_SELECTION,
          nsISelectionController::SCROLL_CENTER_VERTICALLY |
          nsISelectionController::SCROLL_SYNCHRONOUS);
      }

      mCurrentWindow = window;
      *aResult = hasWrapped ? FIND_WRAPPED : FIND_FOUND;
      return NS_OK;
    }

    // ======= end-inner-while (go through a single document) ==========

    // ---------- Nothing found yet, try next document  -------------
    bool hasTriedFirstDoc = false;
    do {
      // ==== Second inner loop - get another while  ====
      if (NS_SUCCEEDED(docShellEnumerator->HasMoreElements(&hasMoreDocShells))
          && hasMoreDocShells) {
        docShellEnumerator->GetNext(getter_AddRefs(currentContainer));
        NS_ASSERTION(currentContainer, "HasMoreElements lied to us!");
        currentDocShell = do_QueryInterface(currentContainer);

        if (currentDocShell)
          break;
      }
      else if (hasTriedFirstDoc)  // Avoid potential infinite loop
        return NS_ERROR_FAILURE;  // No content doc shells

      // Reached last doc shell, loop around back to first doc shell
      rootContentDocShell->GetDocShellEnumerator(nsIDocShellTreeItem::typeContent,
                                                 nsIDocShell::ENUMERATE_FORWARDS,
                                                 getter_AddRefs(docShellEnumerator));
      hasTriedFirstDoc = true;      
    } while (docShellEnumerator);  // ==== end second inner while  ===

    bool continueLoop = false;
    if (currentDocShell != startingDocShell)
      continueLoop = true;  // Try next document
    else if (!hasWrapped || aIsFirstVisiblePreferred) {
      // Finished searching through docshells:
      // If aFirstVisiblePreferred == true, we may need to go through all
      // docshells twice -once to look for visible matches, the second time
      // for any match
      aIsFirstVisiblePreferred = false;
      hasWrapped = true;
      continueLoop = true; // Go through all docs again
    }

    if (continueLoop) {
      if (NS_FAILED(GetSearchContainers(currentContainer, nullptr,
                                        aIsFirstVisiblePreferred, aFindPrev,
                                        getter_AddRefs(presShell),
                                        getter_AddRefs(presContext)))) {
        continue;
      }

      if (aFindPrev) {
        // Reverse mode: swap start and end points, so that we start
        // at end of document and go to beginning
        nsCOMPtr<nsIDOMRange> tempRange;
        mStartPointRange->CloneRange(getter_AddRefs(tempRange));
        if (!mEndPointRange) {
          mEndPointRange = new nsRange(presShell->GetDocument());
        }

        mStartPointRange = mEndPointRange;
        mEndPointRange = tempRange;
      }

      continue;
    }

    // ------------- Failed --------------
    break;
  }   // end-outer-while: go through all docs

  return NS_ERROR_FAILURE;
}