// 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;
}
//-----------------------------------------------------------------------------
already_AddRefed<nsFrameSelection>
nsCaret::GetFrameSelection()
{
nsCOMPtr<nsISelectionPrivate> privateSelection(do_QueryReferent(mDomSelectionWeak));
if (!privateSelection)
return nsnull;
nsFrameSelection* frameSelection = nsnull;
privateSelection->GetFrameSelection(&frameSelection);
return frameSelection;
}
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;
}
//-----------------------------------------------------------------------------
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;
}
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();
}