Exemplo n.º 1
0
nsresult
nsTypeAheadFind::GetSearchContainers(nsISupports *aContainer,
                                     nsISelectionController *aSelectionController,
                                     bool aIsFirstVisiblePreferred,
                                     bool aFindPrev,
                                     nsIPresShell **aPresShell,
                                     nsPresContext **aPresContext)
{
  NS_ENSURE_ARG_POINTER(aContainer);
  NS_ENSURE_ARG_POINTER(aPresShell);
  NS_ENSURE_ARG_POINTER(aPresContext);

  *aPresShell = nsnull;
  *aPresContext = nsnull;

  nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(aContainer));
  if (!docShell)
    return NS_ERROR_FAILURE;

  nsCOMPtr<nsIPresShell> presShell;
  docShell->GetPresShell(getter_AddRefs(presShell));

  nsRefPtr<nsPresContext> presContext;
  docShell->GetPresContext(getter_AddRefs(presContext));

  if (!presShell || !presContext)
    return NS_ERROR_FAILURE;

  nsIDocument* doc = presShell->GetDocument();

  if (!doc)
    return NS_ERROR_FAILURE;

  nsCOMPtr<nsIContent> rootContent;
  nsCOMPtr<nsIDOMHTMLDocument> htmlDoc(do_QueryInterface(doc));
  if (htmlDoc) {
    nsCOMPtr<nsIDOMHTMLElement> bodyEl;
    htmlDoc->GetBody(getter_AddRefs(bodyEl));
    rootContent = do_QueryInterface(bodyEl);
  }

  if (!rootContent)
    rootContent = doc->GetRootElement();
 
  nsCOMPtr<nsIDOMNode> rootNode(do_QueryInterface(rootContent));

  if (!rootNode)
    return NS_ERROR_FAILURE;

  PRUint32 childCount = rootContent->GetChildCount();

  mSearchRange->SelectNodeContents(rootNode);

  mEndPointRange->SetEnd(rootNode, childCount);
  mEndPointRange->Collapse(PR_FALSE); // collapse to end

  // Consider current selection as null if
  // it's not in the currently focused document
  nsCOMPtr<nsIDOMRange> currentSelectionRange;
  nsCOMPtr<nsIPresShell> selectionPresShell = GetPresShell();
  if (aSelectionController && selectionPresShell && selectionPresShell == presShell) {
    nsCOMPtr<nsISelection> selection;
    aSelectionController->GetSelection(
      nsISelectionController::SELECTION_NORMAL, getter_AddRefs(selection));
    if (selection)
      selection->GetRangeAt(0, getter_AddRefs(currentSelectionRange));
  }

  if (!currentSelectionRange) {
    // Ensure visible range, move forward if necessary
    // This uses ignores the return value, but usese the side effect of
    // IsRangeVisible. It returns the first visible range after searchRange
    IsRangeVisible(presShell, presContext, mSearchRange, 
                   aIsFirstVisiblePreferred, PR_TRUE, 
                   getter_AddRefs(mStartPointRange), nsnull);
  }
  else {
    PRInt32 startOffset;
    nsCOMPtr<nsIDOMNode> startNode;
    if (aFindPrev) {
      currentSelectionRange->GetStartContainer(getter_AddRefs(startNode));
      currentSelectionRange->GetStartOffset(&startOffset);
    } else {
      currentSelectionRange->GetEndContainer(getter_AddRefs(startNode));
      currentSelectionRange->GetEndOffset(&startOffset);
    }
    if (!startNode)
      startNode = rootNode;    

    // We need to set the start point this way, other methods haven't worked
    mStartPointRange->SelectNode(startNode);
    mStartPointRange->SetStart(startNode, startOffset);
  }

  mStartPointRange->Collapse(PR_TRUE); // collapse to start

  *aPresShell = presShell;
  NS_ADDREF(*aPresShell);

  *aPresContext = presContext;
  NS_ADDREF(*aPresContext);

  return NS_OK;
}
Exemplo n.º 2
0
NS_IMETHODIMP
nsTypeAheadFind::Find(const nsAString& aSearchString, bool aLinksOnly,
                      PRUint16* aResult)
{
  *aResult = FIND_NOTFOUND;

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

    ds->GetPresShell(getter_AddRefs(presShell));
    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 = nsnull;
    mSelectionController = nsnull;

    *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 = PR_TRUE;
  
    const nsAString& newStr2 = Substring(aSearchString, 0, aSearchString.Length());
    const nsAString& oldStr2 = Substring(mTypeAheadBuffer, 0, aSearchString.Length());
    if (oldStr2.Equals(newStr2))
      atEnd = PR_TRUE;
    
    if (!atEnd)
      mStartFindRange = nsnull;
  }

  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 = PR_TRUE;
    mSoundInterface = do_CreateInstance("@mozilla.org/sound;1");
    if (mSoundInterface && !mNotFoundSoundURL.Equals(NS_LITERAL_CSTRING("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 = nsnull;
#endif

  PRInt32 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, PR_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 = PR_FALSE;
        }
      }
    }
  }

  // ----------- Find the text! ---------------------
  // Beware! This may flush notifications via synchronous
  // ScrollSelectionIntoView.
  nsresult rv = FindItNow(nsnull, aLinksOnly, isFirstVisiblePreferred,
                          PR_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 = nsnull;
      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;
}
Exemplo n.º 3
0
nsresult
nsTypeAheadFind::FindItNow(nsIPresShell *aPresShell, bool aIsLinksOnly,
                           bool aIsFirstVisiblePreferred, bool aFindPrev,
                           PRUint16* aResult)
{
  *aResult = FIND_NOTFOUND;
  mFoundLink = nsnull;
  mFoundEditable = nsnull;
  mCurrentWindow = nsnull;
  nsCOMPtr<nsIPresShell> startingPresShell (GetPresShell());
  if (!startingPresShell) {    
    nsCOMPtr<nsIDocShell> ds = do_QueryReferent(mDocShell);
    NS_ENSURE_TRUE(ds, NS_ERROR_FAILURE);

    ds->GetPresShell(getter_AddRefs(startingPresShell));
    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<nsISupports> startingContainer = presContext->GetContainer();
  nsCOMPtr<nsIDocShellTreeItem> treeItem(do_QueryInterface(startingContainer));
  NS_ASSERTION(treeItem, "Bug 175321 Crashes with Type Ahead Find [@ nsTypeAheadFind::FindItNow]");
  if (!treeItem)
    return NS_ERROR_FAILURE;

  nsCOMPtr<nsIDocShellTreeItem> rootContentTreeItem;
  nsCOMPtr<nsIDocShell> currentDocShell;
  nsCOMPtr<nsIDocShell> startingDocShell(do_QueryInterface(startingContainer));

  treeItem->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 = startingContainer =
    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() : nsnull,
                                    aIsFirstVisiblePreferred,  aFindPrev,
                                    getter_AddRefs(presShell),
                                    getter_AddRefs(presContext)))) {
    return NS_ERROR_FAILURE;
  }

  PRInt16 rangeCompareResult = 0;
  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())
    return NS_ERROR_FAILURE;

  mFind->SetFindBackwards(aFindPrev);

  while (PR_TRUE) {    // ----- Outer while loop: go through all docs -----
    while (PR_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, PR_FALSE,
                          getter_AddRefs(mStartPointRange), 
                          &usesIndependentSelection) ||
          (aIsLinksOnly && !isInsideLink) ||
          (mStartLinksOnlyPref && aIsLinksOnly && !isStartingLink)) {
        // ------ Failure ------
        // Start find again from here
        returnRange->CloneRange(getter_AddRefs(mStartPointRange));

        // Collapse to end
        mStartPointRange->Collapse(aFindPrev);

        continue;
      }

      // ------ 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->GetWindow();
      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 = PR_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, nsnull, 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_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 = PR_TRUE;      
    } while (docShellEnumerator);  // ==== end second inner while  ===

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

    if (continueLoop) {
      if (NS_FAILED(GetSearchContainers(currentContainer, nsnull,
                                        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));
        mStartPointRange = mEndPointRange;
        mEndPointRange = tempRange;
      }

      continue;
    }

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

  return NS_ERROR_FAILURE;
}