// Create the text content used as label for the button.
// The frame will be generated by the frame constructor.
nsIFrame*
nsGfxButtonControlFrame::CreateFrameFor(nsIContent* aContent)
{
nsIFrame * newFrame = nullptr;
if (aContent == mTextContent) {
nsIFrame * parentFrame = mFrames.FirstChild();
nsPresContext* presContext = PresContext();
nsRefPtr<nsStyleContext> textStyleContext;
textStyleContext = presContext->StyleSet()->
ResolveStyleForNonElement(mStyleContext);
if (textStyleContext) {
newFrame = NS_NewTextFrame(presContext->PresShell(), textStyleContext);
if (newFrame) {
// initialize the text frame
newFrame->Init(mTextContent, parentFrame, nullptr);
mTextContent->SetPrimaryFrame(newFrame);
}
}
}
return newFrame;
}
nsIFrame*
nsComboboxControlFrame::CreateFrameFor(nsIContent* aContent)
{
NS_PRECONDITION(nsnull != aContent, "null ptr");
NS_ASSERTION(mDisplayContent, "mDisplayContent can't be null!");
if (mDisplayContent != aContent) {
// We only handle the frames for mDisplayContent here
return nsnull;
}
// Get PresShell
nsIPresShell *shell = PresContext()->PresShell();
nsStyleSet *styleSet = shell->StyleSet();
// create the style contexts for the anonymous block frame and text frame
nsRefPtr<nsStyleContext> styleContext;
styleContext = styleSet->
ResolvePseudoStyleFor(mContent,
nsCSSAnonBoxes::mozDisplayComboboxControlFrame,
mStyleContext);
if (NS_UNLIKELY(!styleContext)) {
return nsnull;
}
nsRefPtr<nsStyleContext> textStyleContext;
textStyleContext = styleSet->ResolveStyleForNonElement(mStyleContext);
if (NS_UNLIKELY(!textStyleContext)) {
return nsnull;
}
// Start by by creating our anonymous block frame
mDisplayFrame = new (shell) nsComboboxDisplayFrame(styleContext, this);
if (NS_UNLIKELY(!mDisplayFrame)) {
return nsnull;
}
nsresult rv = mDisplayFrame->Init(mContent, this, nsnull);
if (NS_FAILED(rv)) {
mDisplayFrame->Destroy();
mDisplayFrame = nsnull;
return nsnull;
}
// Create a text frame and put it inside the block frame
mTextFrame = NS_NewTextFrame(shell, textStyleContext);
if (NS_UNLIKELY(!mTextFrame)) {
return nsnull;
}
// initialize the text frame
rv = mTextFrame->Init(aContent, mDisplayFrame, nsnull);
if (NS_FAILED(rv)) {
mDisplayFrame->Destroy();
mDisplayFrame = nsnull;
mTextFrame->Destroy();
mTextFrame = nsnull;
return nsnull;
}
nsFrameList textList(mTextFrame);
mDisplayFrame->SetInitialChildList(nsnull, textList);
return mDisplayFrame;
}