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fix a bunch of null-derefing problems when accessing http://webmail.netscape.com/ and add some assertions when these things happen

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This commit is contained in:
alecf%netscape.com 1999-09-18 01:00:43 +00:00
parent 0e4b7ac0bf
commit 8bc490a93b
2 changed files with 32 additions and 14 deletions
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23
layout/generic/nsTextFrame.cpp
View File

@ -928,8 +928,10 @@ nsTextFrame::PaintUnicodeText(nsIPresContext* aPresContext,
{
nsCOMPtr<nsIDocument> doc(getter_AddRefs(GetDocument(aPresContext)));
PRBool displaySelection;
displaySelection = doc->GetDisplaySelection();
PRBool displaySelection = PR_FALSE;
NS_ASSERTION(doc, "PaintUnicodeText: PresContext has no document!");
if (doc)
displaySelection = doc->GetDisplaySelection();
// Make enough space to transform
PRUnichar wordBufMem[WORD_BUF_SIZE];
@ -946,7 +948,8 @@ nsTextFrame::PaintUnicodeText(nsIPresContext* aPresContext,
// Transform text from content into renderable form
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
if (doc)
doc->GetLineBreaker(getter_AddRefs(lb));
// nsCOMPtr<nsIWordBreaker> wb;
// doc->GetWordBreaker(getter_AddRefs(wb));
nsTextTransformer tx(wordBufMem, WORD_BUF_SIZE,lb,nsnull);
@ -2103,8 +2106,8 @@ nsTextFrame::PeekOffset(nsPeekOffsetStruct *aPos)
PrepareUnicodeText(tx, ip, paintBuf, &textLength);
nsIFrame *frameUsed = nsnull;
PRBool keepSearching; //if you run out of chars before you hit the end of word, maybe next frame has more text to select?
PRInt32 start;
PRBool keepSearching=PR_FALSE; //if you run out of chars before you hit the end of word, maybe next frame has more text to select?
PRInt32 start=0;
PRBool found = PR_FALSE;
PRBool isWhitespace;
PRInt32 wordLen, contentLen;
@ -2381,6 +2384,9 @@ nsTextFrame::Reflow(nsIPresContext& aPresContext,
// Setup text transformer to transform this frames text content
PRUnichar wordBuf[WORD_BUF_SIZE];
nsCOMPtr<nsILineBreaker> lb;
NS_ASSERTION(doc, "Reflow: mContent has no document!");
if (doc)
doc->GetLineBreaker(getter_AddRefs(lb));
if (doc)
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(wordBuf, WORD_BUF_SIZE,lb,nsnull);
@ -2410,7 +2416,7 @@ nsTextFrame::Reflow(nsIPresContext& aPresContext,
PRInt32 prevColumn = column;
mColumn = column;
PRBool breakable = lineLayout.LineIsBreakable();
PRInt32 lastWordLen;
PRInt32 lastWordLen=0;
PRUnichar* bp = nsnull;
for (;;) {
// Get next word/whitespace from the text
@ -2929,7 +2935,10 @@ nsTextFrame::ComputeWordFragmentWidth(nsIPresContext* aPresContext,
PRUint32 breakP=0;
PRBool needMore=PR_TRUE;
nsresult lres = aLineBreaker->Next(aWordBuf, aWordBufLen+wordLen, 0, &breakP, &needMore);
nsresult lres = NS_ERROR_FAILURE;
NS_ASSERTION(aLineBreaker, "ComputeWordFragmentWidth: No line breaker!");
if (aLineBreaker)
lres = aLineBreaker->Next(aWordBuf, aWordBufLen+wordLen, 0, &breakP, &needMore);
if(NS_SUCCEEDED(lres))
{
// when we look at two pieces text together, we might decide to break

23
layout/html/base/src/nsTextFrame.cpp
View File

@ -928,8 +928,10 @@ nsTextFrame::PaintUnicodeText(nsIPresContext* aPresContext,
{
nsCOMPtr<nsIDocument> doc(getter_AddRefs(GetDocument(aPresContext)));
PRBool displaySelection;
displaySelection = doc->GetDisplaySelection();
PRBool displaySelection = PR_FALSE;
NS_ASSERTION(doc, "PaintUnicodeText: PresContext has no document!");
if (doc)
displaySelection = doc->GetDisplaySelection();
// Make enough space to transform
PRUnichar wordBufMem[WORD_BUF_SIZE];
@ -946,7 +948,8 @@ nsTextFrame::PaintUnicodeText(nsIPresContext* aPresContext,
// Transform text from content into renderable form
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
if (doc)
doc->GetLineBreaker(getter_AddRefs(lb));
// nsCOMPtr<nsIWordBreaker> wb;
// doc->GetWordBreaker(getter_AddRefs(wb));
nsTextTransformer tx(wordBufMem, WORD_BUF_SIZE,lb,nsnull);
@ -2103,8 +2106,8 @@ nsTextFrame::PeekOffset(nsPeekOffsetStruct *aPos)
PrepareUnicodeText(tx, ip, paintBuf, &textLength);
nsIFrame *frameUsed = nsnull;
PRBool keepSearching; //if you run out of chars before you hit the end of word, maybe next frame has more text to select?
PRInt32 start;
PRBool keepSearching=PR_FALSE; //if you run out of chars before you hit the end of word, maybe next frame has more text to select?
PRInt32 start=0;
PRBool found = PR_FALSE;
PRBool isWhitespace;
PRInt32 wordLen, contentLen;
@ -2381,6 +2384,9 @@ nsTextFrame::Reflow(nsIPresContext& aPresContext,
// Setup text transformer to transform this frames text content
PRUnichar wordBuf[WORD_BUF_SIZE];
nsCOMPtr<nsILineBreaker> lb;
NS_ASSERTION(doc, "Reflow: mContent has no document!");
if (doc)
doc->GetLineBreaker(getter_AddRefs(lb));
if (doc)
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(wordBuf, WORD_BUF_SIZE,lb,nsnull);
@ -2410,7 +2416,7 @@ nsTextFrame::Reflow(nsIPresContext& aPresContext,
PRInt32 prevColumn = column;
mColumn = column;
PRBool breakable = lineLayout.LineIsBreakable();
PRInt32 lastWordLen;
PRInt32 lastWordLen=0;
PRUnichar* bp = nsnull;
for (;;) {
// Get next word/whitespace from the text
@ -2929,7 +2935,10 @@ nsTextFrame::ComputeWordFragmentWidth(nsIPresContext* aPresContext,
PRUint32 breakP=0;
PRBool needMore=PR_TRUE;
nsresult lres = aLineBreaker->Next(aWordBuf, aWordBufLen+wordLen, 0, &breakP, &needMore);
nsresult lres = NS_ERROR_FAILURE;
NS_ASSERTION(aLineBreaker, "ComputeWordFragmentWidth: No line breaker!");
if (aLineBreaker)
lres = aLineBreaker->Next(aWordBuf, aWordBufLen+wordLen, 0, &breakP, &needMore);
if(NS_SUCCEEDED(lres))
{
// when we look at two pieces text together, we might decide to break