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Changed to use nsILineBreaker instead of IsAsciiSpace, bug 27062, r=akkana.

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This commit is contained in:
nhotta%netscape.com 2000-04-18 21:04:21 +00:00
parent 6291d0a329
commit 24fd569190
4 changed files with 122 additions and 20 deletions
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69
htmlparser/src/nsHTMLToTXTSinkStream.cpp
View File

@ -46,10 +46,13 @@
#include "nsICharsetAlias.h"
#include "nsIServiceManager.h"
#include "nsICharsetConverterManager.h"
#include "nsILineBreakerFactory.h"
#include "nsLWBrkCIID.h"
#include "nsIOutputStream.h"
#include "nsFileStream.h"
static NS_DEFINE_CID(kCharsetConverterManagerCID, NS_ICHARSETCONVERTERMANAGER_CID);
static NS_DEFINE_CID(kLWBrkCID, NS_LWBRK_CID);
const PRInt32 gTabSize=4;
const PRInt32 gOLNumberWidth = 3;
@ -174,6 +177,7 @@ nsHTMLToTXTSinkStream::nsHTMLToTXTSinkStream()
mBufferLength = 0;
mBuffer = nsnull;
mUnicodeEncoder = nsnull;
mLineBreaker = nsnull;
mWrapColumn = 72; // XXX magic number, we expect someone to reset this
// Flow
@ -206,6 +210,7 @@ nsHTMLToTXTSinkStream::~nsHTMLToTXTSinkStream()
delete[] mTagStack;
delete[] mOLStack;
NS_IF_RELEASE(mUnicodeEncoder);
NS_IF_RELEASE(mLineBreaker);
}
/**
@ -223,7 +228,22 @@ nsHTMLToTXTSinkStream::Initialize(nsIOutputStream* aOutStream,
mString = aOutString;
mFlags = aFlags;
return NS_OK;
nsILineBreakerFactory *lf;
nsresult result = NS_OK;
result = nsServiceManager::GetService(kLWBrkCID,
NS_GET_IID(nsILineBreakerFactory),
(nsISupports **)&lf);
if (NS_SUCCEEDED(result)) {
nsAutoString lbarg("");
result = lf->GetBreaker(lbarg, &mLineBreaker);
if(NS_FAILED(result)) {
mLineBreaker = nsnull;
}
result = nsServiceManager::ReleaseService(kLWBrkCID, lf);
}
return result;
}
/**
@ -977,26 +997,55 @@ nsHTMLToTXTSinkStream::AddToLine(const PRUnichar * aLineFragment, PRInt32 aLineF
// of letters too long.
while(linelength+prefixwidth > mWrapColumn+4) {
// Must wrap. Let's find a good place to do that.
PRInt32 goodSpace = mWrapColumn-prefixwidth;
while (goodSpace >= 0 &&
!nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace))) {
goodSpace--;
PRInt32 goodSpace = mWrapColumn-prefixwidth+1;
nsresult result = NS_OK;
PRBool oNeedMoreText;
if (nsnull != mLineBreaker) {
result = mLineBreaker->Prev(mCurrentLine.GetUnicode(), mCurrentLine.Length(), goodSpace,
(PRUint32 *) &goodSpace, &oNeedMoreText);
if (nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace-1)))
--goodSpace; // adjust the position since line breaker returns a position next to space
}
// fallback if the line breaker is unavailable or failed
if (nsnull == mLineBreaker || NS_FAILED(result)) {
goodSpace = mWrapColumn-prefixwidth;
while (goodSpace >= 0 &&
!nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace))) {
goodSpace--;
}
}
nsAutoString restOfLine;
if(goodSpace<0) {
// If we don't found a good place to break, accept long line and
// try to find another place to break
goodSpace=mWrapColumn-prefixwidth;
while (goodSpace < linelength &&
!nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace))) {
goodSpace++;
goodSpace=mWrapColumn-prefixwidth+1;
result = NS_OK;
if (nsnull != mLineBreaker) {
result = mLineBreaker->Next(mCurrentLine.GetUnicode(), mCurrentLine.Length(), goodSpace,
(PRUint32 *) &goodSpace, &oNeedMoreText);
if (nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace-1)))
--goodSpace; // adjust the position since line breaker returns a position next to space
}
// fallback if the line breaker is unavailable or failed
if (nsnull == mLineBreaker || NS_FAILED(result)) {
goodSpace=mWrapColumn-prefixwidth;
while (goodSpace < linelength &&
!nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace))) {
goodSpace++;
}
}
}
if(goodSpace < linelength && goodSpace > 0) {
// Found a place to break
mCurrentLine.Right(restOfLine, linelength-goodSpace-1);
// -1 (trim a char at the break position)
// only if the line break was a space.
if (nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace)))
mCurrentLine.Right(restOfLine, linelength-goodSpace-1);
else
mCurrentLine.Right(restOfLine, linelength-goodSpace);
mCurrentLine.Cut(goodSpace, linelength-goodSpace);
EndLine(PR_TRUE);
mCurrentLine.Truncate();

2
htmlparser/src/nsHTMLToTXTSinkStream.h
View File

@ -54,6 +54,7 @@
class nsIUnicodeEncoder;
class nsILineBreaker;
class nsIOutputStream;
class nsIHTMLToTXTSinkStream : public nsIHTMLContentSink {
@ -195,6 +196,7 @@ protected:
nsIUnicodeEncoder* mUnicodeEncoder;
nsString mCharsetOverride;
nsILineBreaker* mLineBreaker;
};
inline nsresult

69
parser/htmlparser/src/nsHTMLToTXTSinkStream.cpp
View File

@ -46,10 +46,13 @@
#include "nsICharsetAlias.h"
#include "nsIServiceManager.h"
#include "nsICharsetConverterManager.h"
#include "nsILineBreakerFactory.h"
#include "nsLWBrkCIID.h"
#include "nsIOutputStream.h"
#include "nsFileStream.h"
static NS_DEFINE_CID(kCharsetConverterManagerCID, NS_ICHARSETCONVERTERMANAGER_CID);
static NS_DEFINE_CID(kLWBrkCID, NS_LWBRK_CID);
const PRInt32 gTabSize=4;
const PRInt32 gOLNumberWidth = 3;
@ -174,6 +177,7 @@ nsHTMLToTXTSinkStream::nsHTMLToTXTSinkStream()
mBufferLength = 0;
mBuffer = nsnull;
mUnicodeEncoder = nsnull;
mLineBreaker = nsnull;
mWrapColumn = 72; // XXX magic number, we expect someone to reset this
// Flow
@ -206,6 +210,7 @@ nsHTMLToTXTSinkStream::~nsHTMLToTXTSinkStream()
delete[] mTagStack;
delete[] mOLStack;
NS_IF_RELEASE(mUnicodeEncoder);
NS_IF_RELEASE(mLineBreaker);
}
/**
@ -223,7 +228,22 @@ nsHTMLToTXTSinkStream::Initialize(nsIOutputStream* aOutStream,
mString = aOutString;
mFlags = aFlags;
return NS_OK;
nsILineBreakerFactory *lf;
nsresult result = NS_OK;
result = nsServiceManager::GetService(kLWBrkCID,
NS_GET_IID(nsILineBreakerFactory),
(nsISupports **)&lf);
if (NS_SUCCEEDED(result)) {
nsAutoString lbarg("");
result = lf->GetBreaker(lbarg, &mLineBreaker);
if(NS_FAILED(result)) {
mLineBreaker = nsnull;
}
result = nsServiceManager::ReleaseService(kLWBrkCID, lf);
}
return result;
}
/**
@ -977,26 +997,55 @@ nsHTMLToTXTSinkStream::AddToLine(const PRUnichar * aLineFragment, PRInt32 aLineF
// of letters too long.
while(linelength+prefixwidth > mWrapColumn+4) {
// Must wrap. Let's find a good place to do that.
PRInt32 goodSpace = mWrapColumn-prefixwidth;
while (goodSpace >= 0 &&
!nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace))) {
goodSpace--;
PRInt32 goodSpace = mWrapColumn-prefixwidth+1;
nsresult result = NS_OK;
PRBool oNeedMoreText;
if (nsnull != mLineBreaker) {
result = mLineBreaker->Prev(mCurrentLine.GetUnicode(), mCurrentLine.Length(), goodSpace,
(PRUint32 *) &goodSpace, &oNeedMoreText);
if (nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace-1)))
--goodSpace; // adjust the position since line breaker returns a position next to space
}
// fallback if the line breaker is unavailable or failed
if (nsnull == mLineBreaker || NS_FAILED(result)) {
goodSpace = mWrapColumn-prefixwidth;
while (goodSpace >= 0 &&
!nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace))) {
goodSpace--;
}
}
nsAutoString restOfLine;
if(goodSpace<0) {
// If we don't found a good place to break, accept long line and
// try to find another place to break
goodSpace=mWrapColumn-prefixwidth;
while (goodSpace < linelength &&
!nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace))) {
goodSpace++;
goodSpace=mWrapColumn-prefixwidth+1;
result = NS_OK;
if (nsnull != mLineBreaker) {
result = mLineBreaker->Next(mCurrentLine.GetUnicode(), mCurrentLine.Length(), goodSpace,
(PRUint32 *) &goodSpace, &oNeedMoreText);
if (nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace-1)))
--goodSpace; // adjust the position since line breaker returns a position next to space
}
// fallback if the line breaker is unavailable or failed
if (nsnull == mLineBreaker || NS_FAILED(result)) {
goodSpace=mWrapColumn-prefixwidth;
while (goodSpace < linelength &&
!nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace))) {
goodSpace++;
}
}
}
if(goodSpace < linelength && goodSpace > 0) {
// Found a place to break
mCurrentLine.Right(restOfLine, linelength-goodSpace-1);
// -1 (trim a char at the break position)
// only if the line break was a space.
if (nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace)))
mCurrentLine.Right(restOfLine, linelength-goodSpace-1);
else
mCurrentLine.Right(restOfLine, linelength-goodSpace);
mCurrentLine.Cut(goodSpace, linelength-goodSpace);
EndLine(PR_TRUE);
mCurrentLine.Truncate();

2
parser/htmlparser/src/nsHTMLToTXTSinkStream.h
View File

@ -54,6 +54,7 @@
class nsIUnicodeEncoder;
class nsILineBreaker;
class nsIOutputStream;
class nsIHTMLToTXTSinkStream : public nsIHTMLContentSink {
@ -195,6 +196,7 @@ protected:
nsIUnicodeEncoder* mUnicodeEncoder;
nsString mCharsetOverride;
nsILineBreaker* mLineBreaker;
};
inline nsresult