コード例 #1
0
// Test for distance between caret and text that will be deleted
nsresult
nsTextEditRules::CheckBidiLevelForDeletion(nsISelection         *aSelection,
                                           nsIDOMNode           *aSelNode, 
                                           PRInt32               aSelOffset, 
                                           nsIEditor::EDirection aAction,
                                           bool                 *aCancel)
{
  NS_ENSURE_ARG_POINTER(aCancel);
  *aCancel = false;

  nsCOMPtr<nsIPresShell> shell = mEditor->GetPresShell();
  NS_ENSURE_TRUE(shell, NS_ERROR_NOT_INITIALIZED);
  
  nsPresContext *context = shell->GetPresContext();
  NS_ENSURE_TRUE(context, NS_ERROR_NULL_POINTER);
  
  if (!context->BidiEnabled())
    return NS_OK;
  
  nsCOMPtr<nsIContent> content = do_QueryInterface(aSelNode);
  NS_ENSURE_TRUE(content, NS_ERROR_NULL_POINTER);

  PRUint8 levelBefore;
  PRUint8 levelAfter;

  nsCOMPtr<nsISelectionPrivate> privateSelection(do_QueryInterface(aSelection));
  NS_ENSURE_TRUE(privateSelection, NS_ERROR_NULL_POINTER);
  
  nsRefPtr<nsFrameSelection> frameSelection;
  privateSelection->GetFrameSelection(getter_AddRefs(frameSelection));
  NS_ENSURE_TRUE(frameSelection, NS_ERROR_NULL_POINTER);
  
  nsPrevNextBidiLevels levels = frameSelection->
    GetPrevNextBidiLevels(content, aSelOffset, true);
    
  levelBefore = levels.mLevelBefore;
  levelAfter = levels.mLevelAfter;

  PRUint8 currentCaretLevel = frameSelection->GetCaretBidiLevel();

  PRUint8 levelOfDeletion;
  levelOfDeletion =
    (nsIEditor::eNext==aAction || nsIEditor::eNextWord==aAction) ?
    levelAfter : levelBefore;

  if (currentCaretLevel == levelOfDeletion)
    ; // perform the deletion
  else
  {
    if (mDeleteBidiImmediately || levelBefore == levelAfter)
      ; // perform the deletion
    else
      *aCancel = true;

    // Set the bidi level of the caret to that of the
    // character that will be (or would have been) deleted
    frameSelection->SetCaretBidiLevel(levelOfDeletion);
  }
  return NS_OK;
}
コード例 #2
0
ファイル: nsCaret.cpp プロジェクト: MozillaOnline/gecko-dev
//-----------------------------------------------------------------------------
already_AddRefed<nsFrameSelection>
nsCaret::GetFrameSelection()
{
  nsCOMPtr<nsISelectionPrivate> privateSelection(do_QueryReferent(mDomSelectionWeak));
  if (!privateSelection)
    return nsnull;
  nsFrameSelection* frameSelection = nsnull;
  privateSelection->GetFrameSelection(&frameSelection);
  return frameSelection;
}
コード例 #3
0
NS_IMETHODIMP
nsTextEditRules::AfterEdit(PRInt32 action, nsIEditor::EDirection aDirection)
{
  if (mLockRulesSniffing) return NS_OK;
  
  nsAutoLockRulesSniffing lockIt(this);
  
  NS_PRECONDITION(mActionNesting>0, "bad action nesting!");
  nsresult res = NS_OK;
  if (!--mActionNesting)
  {
    nsCOMPtr<nsISelection>selection;
    res = mEditor->GetSelection(getter_AddRefs(selection));
    NS_ENSURE_SUCCESS(res, res);
  
    res = mEditor->HandleInlineSpellCheck(action, selection,
                                          mCachedSelectionNode, mCachedSelectionOffset,
                                          nsnull, 0, nsnull, 0);
    NS_ENSURE_SUCCESS(res, res);

    // detect empty doc
    res = CreateBogusNodeIfNeeded(selection);
    NS_ENSURE_SUCCESS(res, res);
    
    // insure trailing br node
    res = CreateTrailingBRIfNeeded();
    NS_ENSURE_SUCCESS(res, res);

    // collapse the selection to the trailing BR if it's at the end of our text node
    CollapseSelectionToTrailingBRIfNeeded(selection);
    
    /* After inserting text the cursor Bidi level must be set to the level of the inserted text.
     * This is difficult, because we cannot know what the level is until after the Bidi algorithm
     * is applied to the whole paragraph.
     *
     * So we set the cursor Bidi level to UNDEFINED here, and the caret code will set it correctly later
     */
    if (action == nsEditor::kOpInsertText
        || action == nsEditor::kOpInsertIMEText) {
      nsCOMPtr<nsISelectionPrivate> privateSelection(do_QueryInterface(selection));
      nsCOMPtr<nsFrameSelection> frameSelection;
      privateSelection->GetFrameSelection(getter_AddRefs(frameSelection));      
      if (frameSelection) {
        frameSelection->UndefineCaretBidiLevel();
      }
    }
  }
  return res;
}
コード例 #4
0
ファイル: nsCaret.cpp プロジェクト: MozillaOnline/gecko-dev
//-----------------------------------------------------------------------------
void nsCaret::Terminate()
{
  // this doesn't erase the caret if it's drawn. Should it? We might not have
  // a good drawing environment during teardown.
  
  KillTimer();
  mBlinkTimer = nsnull;

  // unregiser ourselves as a selection listener
  nsCOMPtr<nsISelection> domSelection = do_QueryReferent(mDomSelectionWeak);
  nsCOMPtr<nsISelectionPrivate> privateSelection(do_QueryInterface(domSelection));
  if (privateSelection)
    privateSelection->RemoveSelectionListener(this);
  mDomSelectionWeak = nsnull;
  mPresShell = nsnull;

  mLastContent = nsnull;
}
コード例 #5
0
ファイル: nsCaret.cpp プロジェクト: MozillaOnline/gecko-dev
void nsCaret::DrawCaret(PRBool aInvalidate)
{
  // Do we need to draw the caret at all?
  if (!MustDrawCaret(PR_FALSE))
    return;
  
  // Can we draw the caret now?
  nsCOMPtr<nsIPresShell> presShell = do_QueryReferent(mPresShell);
  NS_ENSURE_TRUE(presShell, /**/);
  {
    PRBool isPaintingSuppressed;
    presShell->IsPaintingSuppressed(&isPaintingSuppressed);
    if (isPaintingSuppressed)
    {
      if (!mDrawn)
        mPendingDraw = PR_TRUE;

      // PresShell::UnsuppressAndInvalidate() will call CheckCaretDrawingState()
      // to get us drawn.
      return;
    }
  }

  nsCOMPtr<nsIDOMNode> node;
  PRInt32 offset;
  nsFrameSelection::HINT hint;
  PRUint8 bidiLevel;

  if (!mDrawn)
  {
    nsCOMPtr<nsISelection> domSelection = do_QueryReferent(mDomSelectionWeak);
    nsCOMPtr<nsISelectionPrivate> privateSelection(do_QueryInterface(domSelection));
    if (!privateSelection) return;
    
    PRBool isCollapsed = PR_FALSE;
    domSelection->GetIsCollapsed(&isCollapsed);
    if (!mShowDuringSelection && !isCollapsed)
      return;

    PRBool hintRight;
    privateSelection->GetInterlinePosition(&hintRight);//translate hint.
    hint = hintRight ? nsFrameSelection::HINTRIGHT : nsFrameSelection::HINTLEFT;

    // get the node and offset, which is where we want the caret to draw
    domSelection->GetFocusNode(getter_AddRefs(node));
    if (!node)
      return;
    
    if (NS_FAILED(domSelection->GetFocusOffset(&offset)))
      return;

    nsCOMPtr<nsFrameSelection> frameSelection = GetFrameSelection();
    if (!frameSelection)
      return;

    bidiLevel = frameSelection->GetCaretBidiLevel();
    mPendingDraw = PR_FALSE;
  }
  else
  {
    if (!mLastContent)
    {
      mDrawn = PR_FALSE;
      return;
    }
    if (!mLastContent->IsInDoc())
    {
      mLastContent = nsnull;
      mDrawn = PR_FALSE;
      return;
    }
    node = do_QueryInterface(mLastContent);
    offset = mLastContentOffset;
    hint = mLastHint;
    bidiLevel = mLastBidiLevel;
  }

  DrawAtPositionWithHint(node, offset, hint, bidiLevel, aInvalidate);
  ToggleDrawnStatus();
}