PRBool
nsCaret::DrawAtPositionWithHint(nsIDOMNode* aNode,
PRInt32 aOffset,
nsFrameSelection::HINT aFrameHint,
PRUint8 aBidiLevel,
PRBool aInvalidate)
{
nsCOMPtr<nsIContent> contentNode = do_QueryInterface(aNode);
if (!contentNode)
return PR_FALSE;
nsIFrame* theFrame = nsnull;
PRInt32 theFrameOffset = 0;
nsresult rv = GetCaretFrameForNodeOffset(contentNode, aOffset, aFrameHint, aBidiLevel,
&theFrame, &theFrameOffset);
if (NS_FAILED(rv) || !theFrame)
return PR_FALSE;
// now we have a frame, check whether it's appropriate to show the caret here
const nsStyleUserInterface* userinterface = theFrame->GetStyleUserInterface();
if ((!mIgnoreUserModify &&
userinterface->mUserModify == NS_STYLE_USER_MODIFY_READ_ONLY) ||
(userinterface->mUserInput == NS_STYLE_USER_INPUT_NONE) ||
(userinterface->mUserInput == NS_STYLE_USER_INPUT_DISABLED))
{
return PR_FALSE;
}
if (!mDrawn)
{
// save stuff so we can figure out what frame we're in later.
mLastContent = contentNode;
mLastContentOffset = aOffset;
mLastHint = aFrameHint;
mLastBidiLevel = aBidiLevel;
// If there has been a reflow, set the caret Bidi level to the level of the current frame
if (aBidiLevel & BIDI_LEVEL_UNDEFINED) {
nsCOMPtr<nsFrameSelection> frameSelection = GetFrameSelection();
if (!frameSelection)
return PR_FALSE;
frameSelection->SetCaretBidiLevel(NS_GET_EMBEDDING_LEVEL(theFrame));
}
// Only update the caret's rect when we're not currently drawn.
rv = UpdateCaretRects(theFrame, theFrameOffset);
if (NS_FAILED(rv))
return PR_FALSE;
}
if (aInvalidate)
InvalidateRects(mCaretRect, mHookRect, theFrame);
return PR_TRUE;
}
nsresult nsWebBrowserFind::ClearFrameSelection(nsIDOMWindow *aWindow)
{
NS_ENSURE_ARG(aWindow);
nsCOMPtr<nsISelection> selection;
GetFrameSelection(aWindow, getter_AddRefs(selection));
if (selection)
selection->RemoveAllRanges();
return NS_OK;
}
nsresult
nsWebBrowserFind::ClearFrameSelection(nsPIDOMWindowOuter* aWindow)
{
NS_ENSURE_ARG(aWindow);
nsCOMPtr<nsISelection> selection = GetFrameSelection(aWindow);
if (selection) {
selection->RemoveAllRanges();
}
return NS_OK;
}
nsIFrame* nsCaret::GetGeometry(nsISelection* aSelection, nsRect* aRect)
{
nsCOMPtr<nsIDOMNode> focusNode;
nsresult rv = aSelection->GetFocusNode(getter_AddRefs(focusNode));
if (NS_FAILED(rv) || !focusNode)
return nsnull;
PRInt32 focusOffset;
rv = aSelection->GetFocusOffset(&focusOffset);
if (NS_FAILED(rv))
return nsnull;
nsCOMPtr<nsIContent> contentNode = do_QueryInterface(focusNode);
if (!contentNode)
return nsnull;
// find the frame that contains the content node that has focus
nsIFrame* theFrame = nsnull;
PRInt32 theFrameOffset = 0;
nsCOMPtr<nsFrameSelection> frameSelection = GetFrameSelection();
if (!frameSelection)
return nsnull;
PRUint8 bidiLevel = frameSelection->GetCaretBidiLevel();
rv = GetCaretFrameForNodeOffset(contentNode, focusOffset,
frameSelection->GetHint(), bidiLevel,
&theFrame, &theFrameOffset);
if (NS_FAILED(rv) || !theFrame)
return nsnull;
nsPoint framePos(0, 0);
rv = theFrame->GetPointFromOffset(theFrameOffset, &framePos);
if (NS_FAILED(rv))
return nsnull;
// now add the frame offset to the view offset, and we're done
nscoord height = theFrame->GetSize().height;
nscoord width = ComputeMetrics(theFrame, theFrameOffset, height).mCaretWidth;
*aRect = nsRect(framePos.x, 0, width, height);
return theFrame;
}
nsresult nsCaret::DrawAtPosition(nsIDOMNode* aNode, PRInt32 aOffset)
{
NS_ENSURE_ARG(aNode);
PRUint8 bidiLevel;
nsCOMPtr<nsFrameSelection> frameSelection = GetFrameSelection();
if (!frameSelection)
return NS_ERROR_FAILURE;
bidiLevel = frameSelection->GetCaretBidiLevel();
// DrawAtPosition is used by consumers who want us to stay drawn where they
// tell us. Setting mBlinkRate to 0 tells us to not set a timer to erase
// ourselves, our consumer will take care of that.
mBlinkRate = 0;
// XXX we need to do more work here to get the correct hint.
nsresult rv = DrawAtPositionWithHint(aNode, aOffset,
nsFrameSelection::HINTLEFT,
bidiLevel, PR_TRUE)
? NS_OK : NS_ERROR_FAILURE;
ToggleDrawnStatus();
return rv;
}
/*
This method handles finding in a single window (aka frame).
*/
nsresult nsWebBrowserFind::SearchInFrame(nsIDOMWindow* aWindow,
bool aWrapping,
bool* aDidFind)
{
NS_ENSURE_ARG(aWindow);
NS_ENSURE_ARG_POINTER(aDidFind);
*aDidFind = false;
nsCOMPtr<nsIDOMDocument> domDoc;
nsresult rv = aWindow->GetDocument(getter_AddRefs(domDoc));
NS_ENSURE_SUCCESS(rv, rv);
if (!domDoc) return NS_ERROR_FAILURE;
// Do security check, to ensure that the frame we're searching is
// acccessible from the frame where the Find is being run.
// get a uri for the window
nsCOMPtr<nsIDocument> theDoc = do_QueryInterface(domDoc);
if (!theDoc) return NS_ERROR_FAILURE;
nsCOMPtr<nsIScriptSecurityManager> secMan =
do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIPrincipal> subject;
rv = secMan->GetSubjectPrincipal(getter_AddRefs(subject));
NS_ENSURE_SUCCESS(rv, rv);
if (subject) {
bool subsumes;
rv = subject->Subsumes(theDoc->NodePrincipal(), &subsumes);
NS_ENSURE_SUCCESS(rv, rv);
if (!subsumes) {
return NS_ERROR_DOM_PROP_ACCESS_DENIED;
}
}
nsCOMPtr<nsIFind> find = do_CreateInstance(NS_FIND_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
(void) find->SetCaseSensitive(mMatchCase);
(void) find->SetFindBackwards(mFindBackwards);
// XXX Make and set a line breaker here, once that's implemented.
(void) find->SetWordBreaker(0);
// Now make sure the content (for actual finding) and frame (for
// selection) models are up to date.
theDoc->FlushPendingNotifications(Flush_Frames);
nsCOMPtr<nsISelection> sel;
GetFrameSelection(aWindow, getter_AddRefs(sel));
NS_ENSURE_ARG_POINTER(sel);
nsCOMPtr<nsIDOMRange> searchRange = nsFind::CreateRange(theDoc);
NS_ENSURE_ARG_POINTER(searchRange);
nsCOMPtr<nsIDOMRange> startPt = nsFind::CreateRange(theDoc);
NS_ENSURE_ARG_POINTER(startPt);
nsCOMPtr<nsIDOMRange> endPt = nsFind::CreateRange(theDoc);
NS_ENSURE_ARG_POINTER(endPt);
nsCOMPtr<nsIDOMRange> foundRange;
// If !aWrapping, search from selection to end
if (!aWrapping)
rv = GetSearchLimits(searchRange, startPt, endPt, domDoc, sel,
false);
// If aWrapping, search the part of the starting frame
// up to the point where we left off.
else
rv = GetSearchLimits(searchRange, startPt, endPt, domDoc, sel,
true);
NS_ENSURE_SUCCESS(rv, rv);
rv = find->Find(mSearchString.get(), searchRange, startPt, endPt,
getter_AddRefs(foundRange));
if (NS_SUCCEEDED(rv) && foundRange)
{
*aDidFind = true;
sel->RemoveAllRanges();
// Beware! This may flush notifications via synchronous
// ScrollSelectionIntoView.
SetSelectionAndScroll(aWindow, foundRange);
}
return rv;
}
nsresult
nsCaret::GetCaretFrameForNodeOffset(nsIContent* aContentNode,
PRInt32 aOffset,
nsFrameSelection::HINT aFrameHint,
PRUint8 aBidiLevel,
nsIFrame** aReturnFrame,
PRInt32* aReturnOffset)
{
//get frame selection and find out what frame to use...
nsCOMPtr<nsIPresShell> presShell = do_QueryReferent(mPresShell);
if (!presShell)
return NS_ERROR_FAILURE;
nsCOMPtr<nsFrameSelection> frameSelection = GetFrameSelection();
if (!frameSelection)
return NS_ERROR_FAILURE;
nsIFrame* theFrame = nsnull;
PRInt32 theFrameOffset = 0;
theFrame = frameSelection->GetFrameForNodeOffset(aContentNode, aOffset,
aFrameHint, &theFrameOffset);
if (!theFrame)
return NS_ERROR_FAILURE;
// if theFrame is after a text frame that's logically at the end of the line
// (e.g. if theFrame is a <br> frame), then put the caret at the end of
// that text frame instead. This way, the caret will be positioned as if
// trailing whitespace was not trimmed.
AdjustCaretFrameForLineEnd(&theFrame, &theFrameOffset);
// Mamdouh : modification of the caret to work at rtl and ltr with Bidi
//
// Direction Style from this->GetStyleData()
// now in (visibility->mDirection)
// ------------------
// NS_STYLE_DIRECTION_LTR : LTR or Default
// NS_STYLE_DIRECTION_RTL
// NS_STYLE_DIRECTION_INHERIT
if (mBidiUI)
{
// If there has been a reflow, take the caret Bidi level to be the level of the current frame
if (aBidiLevel & BIDI_LEVEL_UNDEFINED)
aBidiLevel = NS_GET_EMBEDDING_LEVEL(theFrame);
PRInt32 start;
PRInt32 end;
nsIFrame* frameBefore;
nsIFrame* frameAfter;
PRUint8 levelBefore; // Bidi level of the character before the caret
PRUint8 levelAfter; // Bidi level of the character after the caret
theFrame->GetOffsets(start, end);
if (start == 0 || end == 0 || start == theFrameOffset || end == theFrameOffset)
{
nsPrevNextBidiLevels levels = frameSelection->
GetPrevNextBidiLevels(aContentNode, aOffset, PR_FALSE);
/* Boundary condition, we need to know the Bidi levels of the characters before and after the caret */
if (levels.mFrameBefore || levels.mFrameAfter)
{
frameBefore = levels.mFrameBefore;
frameAfter = levels.mFrameAfter;
levelBefore = levels.mLevelBefore;
levelAfter = levels.mLevelAfter;
if ((levelBefore != levelAfter) || (aBidiLevel != levelBefore))
{
aBidiLevel = NS_MAX(aBidiLevel, NS_MIN(levelBefore, levelAfter)); // rule c3
aBidiLevel = NS_MIN(aBidiLevel, NS_MAX(levelBefore, levelAfter)); // rule c4
if (aBidiLevel == levelBefore // rule c1
|| (aBidiLevel > levelBefore && aBidiLevel < levelAfter && !((aBidiLevel ^ levelBefore) & 1)) // rule c5
|| (aBidiLevel < levelBefore && aBidiLevel > levelAfter && !((aBidiLevel ^ levelBefore) & 1))) // rule c9
{
if (theFrame != frameBefore)
{
if (frameBefore) // if there is a frameBefore, move into it
{
theFrame = frameBefore;
theFrame->GetOffsets(start, end);
theFrameOffset = end;
}
else
{
// if there is no frameBefore, we must be at the beginning of the line
// so we stay with the current frame.
// Exception: when the first frame on the line has a different Bidi level from the paragraph level, there is no
// real frame for the caret to be in. We have to find the visually first frame on the line.
PRUint8 baseLevel = NS_GET_BASE_LEVEL(frameAfter);
if (baseLevel != levelAfter)
{
nsPeekOffsetStruct pos;
pos.SetData(eSelectBeginLine, eDirPrevious, 0, 0, PR_FALSE, PR_TRUE, PR_FALSE, PR_TRUE);
if (NS_SUCCEEDED(frameAfter->PeekOffset(&pos))) {
theFrame = pos.mResultFrame;
theFrameOffset = pos.mContentOffset;
}
}
}
}
}
else if (aBidiLevel == levelAfter // rule c2
|| (aBidiLevel > levelBefore && aBidiLevel < levelAfter && !((aBidiLevel ^ levelAfter) & 1)) // rule c6
|| (aBidiLevel < levelBefore && aBidiLevel > levelAfter && !((aBidiLevel ^ levelAfter) & 1))) // rule c10
{
if (theFrame != frameAfter)
{
if (frameAfter)
{
// if there is a frameAfter, move into it
theFrame = frameAfter;
theFrame->GetOffsets(start, end);
theFrameOffset = start;
}
else
{
// if there is no frameAfter, we must be at the end of the line
// so we stay with the current frame.
// Exception: when the last frame on the line has a different Bidi level from the paragraph level, there is no
// real frame for the caret to be in. We have to find the visually last frame on the line.
PRUint8 baseLevel = NS_GET_BASE_LEVEL(frameBefore);
if (baseLevel != levelBefore)
{
nsPeekOffsetStruct pos;
pos.SetData(eSelectEndLine, eDirNext, 0, 0, PR_FALSE, PR_TRUE, PR_FALSE, PR_TRUE);
if (NS_SUCCEEDED(frameBefore->PeekOffset(&pos))) {
theFrame = pos.mResultFrame;
theFrameOffset = pos.mContentOffset;
}
}
}
}
}
else if (aBidiLevel > levelBefore && aBidiLevel < levelAfter // rule c7/8
&& !((levelBefore ^ levelAfter) & 1) // before and after have the same parity
&& ((aBidiLevel ^ levelAfter) & 1)) // caret has different parity
{
if (NS_SUCCEEDED(frameSelection->GetFrameFromLevel(frameAfter, eDirNext, aBidiLevel, &theFrame)))
{
theFrame->GetOffsets(start, end);
levelAfter = NS_GET_EMBEDDING_LEVEL(theFrame);
if (aBidiLevel & 1) // c8: caret to the right of the rightmost character
theFrameOffset = (levelAfter & 1) ? start : end;
else // c7: caret to the left of the leftmost character
theFrameOffset = (levelAfter & 1) ? end : start;
}
}
else if (aBidiLevel < levelBefore && aBidiLevel > levelAfter // rule c11/12
&& !((levelBefore ^ levelAfter) & 1) // before and after have the same parity
&& ((aBidiLevel ^ levelAfter) & 1)) // caret has different parity
{
if (NS_SUCCEEDED(frameSelection->GetFrameFromLevel(frameBefore, eDirPrevious, aBidiLevel, &theFrame)))
{
theFrame->GetOffsets(start, end);
levelBefore = NS_GET_EMBEDDING_LEVEL(theFrame);
if (aBidiLevel & 1) // c12: caret to the left of the leftmost character
theFrameOffset = (levelBefore & 1) ? end : start;
else // c11: caret to the right of the rightmost character
theFrameOffset = (levelBefore & 1) ? start : end;
}
}
}
}
}
}
*aReturnFrame = theFrame;
*aReturnOffset = theFrameOffset;
return NS_OK;
}
//-----------------------------------------------------------------------------
nsresult nsCaret::GetCaretCoordinates(EViewCoordinates aRelativeToType,
nsISelection *aDOMSel,
nsRect *outCoordinates,
PRBool *outIsCollapsed,
nsIView **outView)
{
if (!mPresShell)
return NS_ERROR_NOT_INITIALIZED;
if (!outCoordinates || !outIsCollapsed)
return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsISelection> domSelection = aDOMSel;
if (outView)
*outView = nsnull;
// fill in defaults for failure
outCoordinates->x = -1;
outCoordinates->y = -1;
outCoordinates->width = -1;
outCoordinates->height = -1;
*outIsCollapsed = PR_FALSE;
nsresult err = domSelection->GetIsCollapsed(outIsCollapsed);
if (NS_FAILED(err))
return err;
nsCOMPtr<nsIDOMNode> focusNode;
err = domSelection->GetFocusNode(getter_AddRefs(focusNode));
if (NS_FAILED(err))
return err;
if (!focusNode)
return NS_ERROR_FAILURE;
PRInt32 focusOffset;
err = domSelection->GetFocusOffset(&focusOffset);
if (NS_FAILED(err))
return err;
nsCOMPtr<nsIContent> contentNode = do_QueryInterface(focusNode);
if (!contentNode)
return NS_ERROR_FAILURE;
// find the frame that contains the content node that has focus
nsIFrame* theFrame = nsnull;
PRInt32 theFrameOffset = 0;
nsCOMPtr<nsFrameSelection> frameSelection = GetFrameSelection();
if (!frameSelection)
return NS_ERROR_FAILURE;
PRUint8 bidiLevel = frameSelection->GetCaretBidiLevel();
err = GetCaretFrameForNodeOffset(contentNode, focusOffset,
frameSelection->GetHint(), bidiLevel,
&theFrame, &theFrameOffset);
if (NS_FAILED(err) || !theFrame)
return err;
nsPoint viewOffset(0, 0);
nsIView *drawingView; // views are not refcounted
GetViewForRendering(theFrame, aRelativeToType, viewOffset, &drawingView, outView);
if (!drawingView)
return NS_ERROR_UNEXPECTED;
nsPoint framePos(0, 0);
err = theFrame->GetPointFromOffset(theFrameOffset, &framePos);
if (NS_FAILED(err))
return err;
// we don't need drawingView anymore so reuse that; reset viewOffset values for our purposes
if (aRelativeToType == eClosestViewCoordinates)
{
theFrame->GetOffsetFromView(viewOffset, &drawingView);
if (outView)
*outView = drawingView;
}
// now add the frame offset to the view offset, and we're done
viewOffset += framePos;
outCoordinates->x = viewOffset.x;
outCoordinates->y = viewOffset.y;
outCoordinates->height = theFrame->GetSize().height;
outCoordinates->width = ComputeMetrics(theFrame, theFrameOffset, outCoordinates->height).mCaretWidth;
return NS_OK;
}
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();
}
