зеркало из https://github.com/mozilla/gecko-dev.git
1120 строки
32 KiB
C++
1120 строки
32 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#include "nsCOMPtr.h"
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#include "nsTextTransformer.h"
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#include "nsIContent.h"
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#include "nsIFrame.h"
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#include "nsIStyleContext.h"
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#include "nsITextContent.h"
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#include "nsStyleConsts.h"
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#include "nsILineBreaker.h"
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#include "nsIWordBreaker.h"
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#include "nsHTMLIIDs.h"
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#include "nsIServiceManager.h"
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#include "nsUnicharUtilCIID.h"
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#include "nsICaseConversion.h"
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#include "prenv.h"
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nsAutoTextBuffer::nsAutoTextBuffer()
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: mBuffer(mAutoBuffer),
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mBufferLen(NS_TEXT_TRANSFORMER_AUTO_WORD_BUF_SIZE)
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{
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}
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nsAutoTextBuffer::~nsAutoTextBuffer()
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{
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if (mBuffer && (mBuffer != mAutoBuffer)) {
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delete [] mBuffer;
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}
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}
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nsresult
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nsAutoTextBuffer::GrowBy(PRInt32 aAtLeast, PRBool aCopyToHead)
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{
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PRInt32 newSize = mBufferLen * 2;
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if (newSize < mBufferLen + aAtLeast) {
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newSize = mBufferLen + aAtLeast + 100;
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}
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return GrowTo(newSize, aCopyToHead);
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}
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nsresult
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nsAutoTextBuffer::GrowTo(PRInt32 aNewSize, PRBool aCopyToHead)
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{
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if (aNewSize > mBufferLen) {
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PRUnichar* newBuffer = new PRUnichar[aNewSize];
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if (!newBuffer) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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nsCRT::memcpy(&newBuffer[aCopyToHead ? 0 : mBufferLen],
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mBuffer, sizeof(PRUnichar) * mBufferLen);
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if (mBuffer != mAutoBuffer) {
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delete [] mBuffer;
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}
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mBuffer = newBuffer;
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mBufferLen = aNewSize;
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}
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return NS_OK;
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}
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//----------------------------------------------------------------------
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static NS_DEFINE_IID(kUnicharUtilCID, NS_UNICHARUTIL_CID);
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static NS_DEFINE_IID(kICaseConversionIID, NS_ICASECONVERSION_IID);
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static nsICaseConversion* gCaseConv = nsnull;
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nsresult
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nsTextTransformer::Initialize()
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{
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nsresult res = NS_OK;
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if (!gCaseConv) {
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res = nsServiceManager::GetService(kUnicharUtilCID, kICaseConversionIID,
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(nsISupports**)&gCaseConv);
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NS_ASSERTION( NS_SUCCEEDED(res), "cannot get UnicharUtil");
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NS_ASSERTION( gCaseConv != NULL, "cannot get UnicharUtil");
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}
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return res;
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}
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void
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nsTextTransformer::Shutdown()
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{
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if (gCaseConv) {
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nsServiceManager::ReleaseService(kUnicharUtilCID, gCaseConv);
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gCaseConv = nsnull;
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}
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}
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// For now, we have only a single character to strip out. If we get
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// any more, change this to use a bitset to lookup into.
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#define IS_DISCARDED(_ch) \
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((_ch) == CH_SHY)
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#define MAX_UNIBYTE 127
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MOZ_DECL_CTOR_COUNTER(nsTextTransformer);
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nsTextTransformer::nsTextTransformer(nsILineBreaker* aLineBreaker,
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nsIWordBreaker* aWordBreaker)
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: mHasMultibyte(PR_FALSE),
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mFrag(nsnull),
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mOffset(0),
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mTextTransform(NS_STYLE_TEXT_TRANSFORM_NONE),
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mMode(eNormal),
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mLineBreaker(aLineBreaker),
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mWordBreaker(aWordBreaker)
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{
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MOZ_COUNT_CTOR(nsTextTransformer);
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#ifdef DEBUG
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static PRBool firstTime = PR_TRUE;
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if (firstTime) {
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firstTime = PR_FALSE;
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SelfTest(aLineBreaker, aWordBreaker);
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}
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#endif
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}
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nsTextTransformer::~nsTextTransformer()
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{
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MOZ_COUNT_DTOR(nsTextTransformer);
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}
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nsresult
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nsTextTransformer::Init(nsIFrame* aFrame,
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nsIContent* aContent,
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PRInt32 aStartingOffset)
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{
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// Get the contents text content
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nsresult rv;
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nsCOMPtr<nsITextContent> tc = do_QueryInterface(aContent, &rv);
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if (tc.get()) {
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tc->GetText(&mFrag);
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// Sanitize aStartingOffset
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if (NS_WARN_IF_FALSE(aStartingOffset >= 0, "bad starting offset")) {
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aStartingOffset = 0;
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}
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else if (NS_WARN_IF_FALSE(aStartingOffset <= mFrag->GetLength(),
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"bad starting offset")) {
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aStartingOffset = mFrag->GetLength();
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}
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mOffset = aStartingOffset;
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// Get the frames text style information
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const nsStyleText* styleText;
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aFrame->GetStyleData(eStyleStruct_Text, (const nsStyleStruct*&) styleText);
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if (NS_STYLE_WHITESPACE_PRE == styleText->mWhiteSpace) {
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mMode = ePreformatted;
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}
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else if (NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == styleText->mWhiteSpace) {
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mMode = ePreWrap;
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}
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mTextTransform = styleText->mTextTransform;
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}
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return rv;
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}
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//----------------------------------------------------------------------
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// wordlen==1, contentlen=newOffset-currentOffset, isWhitespace=t
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PRInt32
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nsTextTransformer::ScanNormalWhiteSpace_F()
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{
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const nsTextFragment* frag = mFrag;
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PRInt32 fragLen = frag->GetLength();
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PRInt32 offset = mOffset;
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for (; offset < fragLen; offset++) {
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PRUnichar ch = frag->CharAt(offset);
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if (!XP_IS_SPACE(ch)) {
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// If character is not discardable then stop looping, otherwise
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// let the discarded character collapse with the other spaces.
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if (!IS_DISCARDED(ch)) {
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break;
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}
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}
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}
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mTransformBuf.mBuffer[0] = ' ';
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return offset;
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}
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// wordlen==*aWordLen, contentlen=newOffset-currentOffset, isWhitespace=f
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PRInt32
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nsTextTransformer::ScanNormalAsciiText_F(PRInt32* aWordLen)
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{
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const nsTextFragment* frag = mFrag;
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PRInt32 fragLen = frag->GetLength();
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PRInt32 offset = mOffset;
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PRUnichar* bp = mTransformBuf.GetBuffer();
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PRUnichar* endbp = mTransformBuf.GetBufferEnd();
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for (; offset < fragLen; offset++) {
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PRUnichar ch = frag->CharAt(offset);
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if (XP_IS_SPACE(ch)) {
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break;
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}
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if (CH_NBSP == ch) {
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ch = ' ';
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}
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else if (IS_DISCARDED(ch)) {
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// Strip discarded characters from the transformed output
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continue;
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}
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if (ch > MAX_UNIBYTE) mHasMultibyte = PR_TRUE;
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if (bp == endbp) {
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PRInt32 oldLength = bp - mTransformBuf.GetBuffer();
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nsresult rv = mTransformBuf.GrowBy(1000);
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if (NS_FAILED(rv)) {
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// If we run out of space (unlikely) then just chop the input
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break;
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}
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bp = mTransformBuf.GetBuffer() + oldLength;
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endbp = mTransformBuf.GetBufferEnd();
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}
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*bp++ = ch;
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}
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*aWordLen = bp - mTransformBuf.GetBuffer();
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return offset;
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}
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// wordlen==*aWordLen, contentlen=newOffset-currentOffset, isWhitespace=f
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PRInt32
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nsTextTransformer::ScanNormalUnicodeText_F(PRBool aForLineBreak,
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PRInt32* aWordLen)
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{
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const nsTextFragment* frag = mFrag;
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const PRUnichar* cp0 = frag->Get2b();
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PRInt32 fragLen = frag->GetLength();
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PRInt32 offset = mOffset;
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PRUnichar firstChar = frag->CharAt(offset++);
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if (CH_NBSP == firstChar) {
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firstChar = ' ';
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}
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mTransformBuf.mBuffer[0] = firstChar;
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if (firstChar > MAX_UNIBYTE) mHasMultibyte = PR_TRUE;
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// Only evaluate complex breaking logic if there are more characters
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// beyond the first to look at.
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PRInt32 numChars = 1;
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if (offset < fragLen) {
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const PRUnichar* cp = cp0 + offset;
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PRBool breakBetween = PR_FALSE;
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if (aForLineBreak) {
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mLineBreaker->BreakInBetween(mTransformBuf.GetBuffer(), 1,
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cp, (fragLen-offset), &breakBetween);
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}
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else {
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mWordBreaker->BreakInBetween(mTransformBuf.GetBuffer(), 1,
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cp, (fragLen-offset), &breakBetween);
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}
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if (!breakBetween) {
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// Find next position
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PRBool tryNextFrag;
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PRUint32 next;
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if (aForLineBreak) {
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mLineBreaker->Next(cp0, fragLen, offset, &next, &tryNextFrag);
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}
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else {
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mWordBreaker->Next(cp0, fragLen, offset, &next, &tryNextFrag);
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}
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numChars = (PRInt32) (next - (PRUint32) offset) + 1;
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// Grow buffer before copying
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nsresult rv = mTransformBuf.GrowTo(numChars);
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if (NS_FAILED(rv)) {
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numChars = mTransformBuf.GetBufferLength();
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}
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// 1. convert nbsp into space
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// 2. check mHasMultibyte flag
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// 3. copy buffer
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PRUnichar* bp = mTransformBuf.GetBuffer() + 1;
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const PRUnichar* end = cp + numChars - 1;
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while (cp < end) {
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PRUnichar ch = *cp++;
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if (CH_NBSP == ch) {
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ch = ' ';
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}
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else if (IS_DISCARDED(ch)) {
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// Strip discarded characters from the transformed output
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continue;
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}
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if (ch > MAX_UNIBYTE) mHasMultibyte = PR_TRUE;
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*bp++ = ch;
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}
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// Recompute offset and numChars in case we stripped something
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offset += numChars - 1;
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numChars = bp - mTransformBuf.GetBuffer();
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}
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}
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*aWordLen = numChars;
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return offset;
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}
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// wordlen==*aWordLen, contentlen=newOffset-currentOffset, isWhitespace=t
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PRInt32
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nsTextTransformer::ScanPreWrapWhiteSpace_F(PRInt32* aWordLen)
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{
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const nsTextFragment* frag = mFrag;
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PRInt32 fragLen = frag->GetLength();
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PRInt32 offset = mOffset;
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PRUnichar* bp = mTransformBuf.GetBuffer();
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PRUnichar* endbp = mTransformBuf.GetBufferEnd();
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for (; offset < fragLen; offset++) {
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PRUnichar ch = frag->CharAt(offset);
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if (!XP_IS_SPACE(ch) || (ch == '\t') || (ch == '\n')) {
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if (IS_DISCARDED(ch)) {
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// Keep looping if this is a discarded character
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continue;
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}
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break;
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}
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if (bp == endbp) {
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PRInt32 oldLength = bp - mTransformBuf.GetBuffer();
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nsresult rv = mTransformBuf.GrowBy(1000);
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if (NS_FAILED(rv)) {
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// If we run out of space (unlikely) then just chop the input
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break;
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}
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bp = mTransformBuf.GetBuffer() + oldLength;
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endbp = mTransformBuf.GetBufferEnd();
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}
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*bp++ = ' ';
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}
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*aWordLen = bp - mTransformBuf.GetBuffer();
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return offset;
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}
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// wordlen==*aWordLen, contentlen=newOffset-currentOffset, isWhitespace=f
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PRInt32
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nsTextTransformer::ScanPreData_F(PRInt32* aWordLen)
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{
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const nsTextFragment* frag = mFrag;
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PRInt32 fragLen = frag->GetLength();
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PRInt32 offset = mOffset;
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PRUnichar* bp = mTransformBuf.GetBuffer();
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PRUnichar* endbp = mTransformBuf.GetBufferEnd();
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for (; offset < fragLen; offset++) {
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PRUnichar ch = frag->CharAt(offset);
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if ((ch == '\t') || (ch == '\n')) {
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break;
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}
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if (CH_NBSP == ch) {
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ch = ' ';
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}
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else if (IS_DISCARDED(ch)) {
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continue;
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}
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if (ch > MAX_UNIBYTE) mHasMultibyte = PR_TRUE;
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if (bp == endbp) {
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PRInt32 oldLength = bp - mTransformBuf.GetBuffer();
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nsresult rv = mTransformBuf.GrowBy(1000);
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if (NS_FAILED(rv)) {
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// If we run out of space (unlikely) then just chop the input
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break;
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}
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bp = mTransformBuf.GetBuffer() + oldLength;
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endbp = mTransformBuf.GetBufferEnd();
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}
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*bp++ = ch;
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}
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*aWordLen = bp - mTransformBuf.GetBuffer();
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return offset;
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}
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// wordlen==*aWordLen, contentlen=newOffset-currentOffset, isWhitespace=f
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PRInt32
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nsTextTransformer::ScanPreAsciiData_F(PRInt32* aWordLen)
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{
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const nsTextFragment* frag = mFrag;
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PRUnichar* bp = mTransformBuf.GetBuffer();
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PRUnichar* endbp = mTransformBuf.GetBufferEnd();
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const unsigned char* cp = (const unsigned char*) frag->Get1b();
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const unsigned char* end = cp + frag->GetLength();
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cp += mOffset;
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while (cp < end) {
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PRUnichar ch = (PRUnichar) *cp++;
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if ((ch == '\t') || (ch == '\n')) {
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cp--;
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break;
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}
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if (CH_NBSP == ch) {
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ch = ' ';
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}
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else if (IS_DISCARDED(ch)) {
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continue;
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}
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if (ch > MAX_UNIBYTE) mHasMultibyte = PR_TRUE;
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if (bp == endbp) {
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PRInt32 oldLength = bp - mTransformBuf.GetBuffer();
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nsresult rv = mTransformBuf.GrowBy(1000);
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if (NS_FAILED(rv)) {
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// If we run out of space (unlikely) then just chop the input
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break;
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}
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bp = mTransformBuf.GetBuffer() + oldLength;
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endbp = mTransformBuf.GetBufferEnd();
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}
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*bp++ = ch;
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}
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*aWordLen = bp - mTransformBuf.GetBuffer();
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return cp - ((const unsigned char*)frag->Get1b());
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}
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//----------------------------------------
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PRUnichar*
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nsTextTransformer::GetNextWord(PRBool aInWord,
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PRInt32* aWordLenResult,
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PRInt32* aContentLenResult,
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PRBool* aIsWhiteSpaceResult,
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PRBool aForLineBreak)
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{
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const nsTextFragment* frag = mFrag;
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PRInt32 fragLen = frag->GetLength();
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PRInt32 offset = mOffset;
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PRInt32 wordLen = 0;
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PRBool isWhitespace = PR_FALSE;
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PRUnichar* result = nsnull;
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// Fix word breaking problem w/ PREFORMAT and PREWRAP
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// for word breaking, we should really go to the normal code
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if((! aForLineBreak) && (eNormal != mMode))
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mMode = eNormal;
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while (offset < fragLen) {
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PRUnichar firstChar = frag->CharAt(offset);
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// Eat up any discarded characters before dispatching
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if (IS_DISCARDED(firstChar)) {
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offset++;
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continue;
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}
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switch (mMode) {
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default:
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case eNormal:
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if (XP_IS_SPACE(firstChar)) {
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offset = ScanNormalWhiteSpace_F();
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wordLen = 1;
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isWhitespace = PR_TRUE;
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}
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else if (frag->Is2b()) {
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offset = ScanNormalUnicodeText_F(aForLineBreak, &wordLen);
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}
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else {
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offset = ScanNormalAsciiText_F(&wordLen);
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}
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break;
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case ePreformatted:
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if (('\n' == firstChar) || ('\t' == firstChar)) {
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mTransformBuf.mBuffer[0] = firstChar;
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offset++;
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wordLen = 1;
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isWhitespace = PR_TRUE;
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}
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else if (frag->Is2b()) {
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offset = ScanPreData_F(&wordLen);
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}
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else {
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offset = ScanPreAsciiData_F(&wordLen);
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}
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break;
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case ePreWrap:
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if (XP_IS_SPACE(firstChar)) {
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if (('\n' == firstChar) || ('\t' == firstChar)) {
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mTransformBuf.mBuffer[0] = firstChar;
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offset++;
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wordLen = 1;
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}
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else {
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offset = ScanPreWrapWhiteSpace_F(&wordLen);
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}
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isWhitespace = PR_TRUE;
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}
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else if (frag->Is2b()) {
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offset = ScanNormalUnicodeText_F(aForLineBreak, &wordLen);
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}
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else {
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offset = ScanNormalAsciiText_F(&wordLen);
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}
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break;
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}
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result = mTransformBuf.GetBuffer();
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if (!isWhitespace) {
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switch (mTextTransform) {
|
|
case NS_STYLE_TEXT_TRANSFORM_CAPITALIZE:
|
|
gCaseConv->ToTitle(result, result, wordLen, !aInWord);
|
|
break;
|
|
case NS_STYLE_TEXT_TRANSFORM_LOWERCASE:
|
|
gCaseConv->ToLower(result, result, wordLen);
|
|
break;
|
|
case NS_STYLE_TEXT_TRANSFORM_UPPERCASE:
|
|
gCaseConv->ToUpper(result, result, wordLen);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
*aWordLenResult = wordLen;
|
|
*aContentLenResult = offset - mOffset;
|
|
*aIsWhiteSpaceResult = isWhitespace;
|
|
|
|
mOffset = offset;
|
|
|
|
return result;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
// wordlen==1, contentlen=newOffset-currentOffset, isWhitespace=t
|
|
PRInt32
|
|
nsTextTransformer::ScanNormalWhiteSpace_B()
|
|
{
|
|
const nsTextFragment* frag = mFrag;
|
|
PRInt32 offset = mOffset;
|
|
|
|
while (--offset >= 0) {
|
|
PRUnichar ch = frag->CharAt(offset);
|
|
if (!XP_IS_SPACE(ch)) {
|
|
// If character is not discardable then stop looping, otherwise
|
|
// let the discarded character collapse with the other spaces.
|
|
if (!IS_DISCARDED(ch)) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
mTransformBuf.mBuffer[mTransformBuf.mBufferLen - 1] = ' ';
|
|
return offset;
|
|
}
|
|
|
|
// wordlen==*aWordLen, contentlen=newOffset-currentOffset, isWhitespace=f
|
|
PRInt32
|
|
nsTextTransformer::ScanNormalAsciiText_B(PRInt32* aWordLen)
|
|
{
|
|
const nsTextFragment* frag = mFrag;
|
|
PRInt32 offset = mOffset;
|
|
PRUnichar* bp = mTransformBuf.GetBufferEnd();
|
|
PRUnichar* startbp = mTransformBuf.GetBuffer();
|
|
|
|
while (--offset >= 0) {
|
|
PRUnichar ch = frag->CharAt(offset);
|
|
if (XP_IS_SPACE(ch)) {
|
|
break;
|
|
}
|
|
if (CH_NBSP == ch) {
|
|
ch = ' ';
|
|
}
|
|
else if (IS_DISCARDED(ch)) {
|
|
continue;
|
|
}
|
|
if (ch > MAX_UNIBYTE) mHasMultibyte = PR_TRUE;
|
|
if (bp == startbp) {
|
|
PRInt32 oldLength = mTransformBuf.mBufferLen;
|
|
nsresult rv = mTransformBuf.GrowBy(1000);
|
|
if (NS_FAILED(rv)) {
|
|
// If we run out of space (unlikely) then just chop the input
|
|
break;
|
|
}
|
|
bp = mTransformBuf.GetBufferEnd() - oldLength;
|
|
startbp = mTransformBuf.GetBuffer();
|
|
}
|
|
*--bp = ch;
|
|
}
|
|
|
|
*aWordLen = mTransformBuf.GetBufferEnd() - bp;
|
|
return offset;
|
|
}
|
|
|
|
// wordlen==*aWordLen, contentlen=newOffset-currentOffset, isWhitespace=f
|
|
PRInt32
|
|
nsTextTransformer::ScanNormalUnicodeText_B(PRBool aForLineBreak,
|
|
PRInt32* aWordLen)
|
|
{
|
|
const nsTextFragment* frag = mFrag;
|
|
const PRUnichar* cp0 = frag->Get2b();
|
|
PRInt32 offset = mOffset - 1;
|
|
|
|
PRUnichar firstChar = frag->CharAt(offset);
|
|
if (CH_NBSP == firstChar) {
|
|
firstChar = ' ';
|
|
}
|
|
mTransformBuf.mBuffer[mTransformBuf.mBufferLen - 1] = firstChar;
|
|
if (firstChar > MAX_UNIBYTE) mHasMultibyte = PR_TRUE;
|
|
|
|
PRInt32 numChars = 1;
|
|
if (offset > 0) {
|
|
const PRUnichar* cp = cp0 + offset;
|
|
PRBool breakBetween = PR_FALSE;
|
|
if (aForLineBreak) {
|
|
mLineBreaker->BreakInBetween(cp0, offset + 1,
|
|
mTransformBuf.GetBufferEnd()-1, 1,
|
|
&breakBetween);
|
|
}
|
|
else {
|
|
mWordBreaker->BreakInBetween(cp0, offset + 1,
|
|
mTransformBuf.GetBufferEnd()-1, 1,
|
|
&breakBetween);
|
|
}
|
|
|
|
if (!breakBetween) {
|
|
// Find next position
|
|
PRBool tryPrevFrag;
|
|
PRUint32 prev;
|
|
if (aForLineBreak) {
|
|
mLineBreaker->Prev(cp0, offset, offset, &prev, &tryPrevFrag);
|
|
}
|
|
else {
|
|
mWordBreaker->Prev(cp0, offset, offset, &prev, &tryPrevFrag);
|
|
}
|
|
numChars = (PRInt32) ((PRUint32) offset - prev) + 1;
|
|
|
|
// Grow buffer before copying
|
|
nsresult rv = mTransformBuf.GrowTo(numChars);
|
|
if (NS_FAILED(rv)) {
|
|
numChars = mTransformBuf.GetBufferLength();
|
|
}
|
|
|
|
// 1. convert nbsp into space
|
|
// 2. check mHasMultibyte flag
|
|
// 3. copy buffer
|
|
PRUnichar* bp = mTransformBuf.GetBufferEnd() - 1;
|
|
const PRUnichar* end = cp - numChars + 1;
|
|
while (cp > end) {
|
|
PRUnichar ch = *--cp;
|
|
if (CH_NBSP == ch) {
|
|
ch = ' ';
|
|
}
|
|
else if (IS_DISCARDED(ch)) {
|
|
continue;
|
|
}
|
|
if (ch > MAX_UNIBYTE) mHasMultibyte = PR_TRUE;
|
|
*--bp = ch;
|
|
}
|
|
|
|
// Recompute offset and numChars in case we stripped something
|
|
offset = offset - numChars;
|
|
numChars = mTransformBuf.GetBufferEnd() - bp;
|
|
}
|
|
}
|
|
|
|
*aWordLen = numChars;
|
|
return offset;
|
|
}
|
|
|
|
// wordlen==*aWordLen, contentlen=newOffset-currentOffset, isWhitespace=t
|
|
PRInt32
|
|
nsTextTransformer::ScanPreWrapWhiteSpace_B(PRInt32* aWordLen)
|
|
{
|
|
const nsTextFragment* frag = mFrag;
|
|
PRInt32 offset = mOffset;
|
|
PRUnichar* bp = mTransformBuf.GetBufferEnd();
|
|
PRUnichar* startbp = mTransformBuf.GetBuffer();
|
|
|
|
while (--offset >= 0) {
|
|
PRUnichar ch = frag->CharAt(offset);
|
|
if (!XP_IS_SPACE(ch) || (ch == '\t') || (ch == '\n')) {
|
|
// Keep looping if this is a discarded character
|
|
if (IS_DISCARDED(ch)) {
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
if (bp == startbp) {
|
|
PRInt32 oldLength = mTransformBuf.mBufferLen;
|
|
nsresult rv = mTransformBuf.GrowBy(1000);
|
|
if (NS_FAILED(rv)) {
|
|
// If we run out of space (unlikely) then just chop the input
|
|
break;
|
|
}
|
|
bp = mTransformBuf.GetBufferEnd() - oldLength;
|
|
startbp = mTransformBuf.GetBuffer();
|
|
}
|
|
*--bp = ' ';
|
|
}
|
|
|
|
*aWordLen = mTransformBuf.GetBufferEnd() - bp;
|
|
return offset;
|
|
}
|
|
|
|
// wordlen==*aWordLen, contentlen=newOffset-currentOffset, isWhitespace=f
|
|
PRInt32
|
|
nsTextTransformer::ScanPreData_B(PRInt32* aWordLen)
|
|
{
|
|
const nsTextFragment* frag = mFrag;
|
|
PRInt32 offset = mOffset;
|
|
PRUnichar* bp = mTransformBuf.GetBufferEnd();
|
|
PRUnichar* startbp = mTransformBuf.GetBuffer();
|
|
|
|
while (--offset >= 0) {
|
|
PRUnichar ch = frag->CharAt(offset);
|
|
if ((ch == '\t') || (ch == '\n')) {
|
|
break;
|
|
}
|
|
if (CH_NBSP == ch) {
|
|
ch = ' ';
|
|
}
|
|
else if (IS_DISCARDED(ch)) {
|
|
continue;
|
|
}
|
|
if (ch > MAX_UNIBYTE) mHasMultibyte = PR_TRUE;
|
|
if (bp == startbp) {
|
|
PRInt32 oldLength = mTransformBuf.mBufferLen;
|
|
nsresult rv = mTransformBuf.GrowBy(1000);
|
|
if (NS_FAILED(rv)) {
|
|
// If we run out of space (unlikely) then just chop the input
|
|
offset++;
|
|
break;
|
|
}
|
|
bp = mTransformBuf.GetBufferEnd() - oldLength;
|
|
startbp = mTransformBuf.GetBuffer();
|
|
}
|
|
*--bp = ch;
|
|
}
|
|
|
|
*aWordLen = mTransformBuf.GetBufferEnd() - bp;
|
|
return offset;
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
PRUnichar*
|
|
nsTextTransformer::GetPrevWord(PRBool aInWord,
|
|
PRInt32* aWordLenResult,
|
|
PRInt32* aContentLenResult,
|
|
PRBool* aIsWhiteSpaceResult,
|
|
PRBool aForLineBreak)
|
|
{
|
|
const nsTextFragment* frag = mFrag;
|
|
PRInt32 offset = mOffset;
|
|
PRInt32 wordLen = 0;
|
|
PRBool isWhitespace = PR_FALSE;
|
|
PRUnichar* result = nsnull;
|
|
|
|
// Fix word breaking problem w/ PREFORMAT and PREWRAP
|
|
// for word breaking, we should really go to the normal code
|
|
if((! aForLineBreak) && (eNormal != mMode))
|
|
mMode = eNormal;
|
|
|
|
while (--offset >= 0) {
|
|
PRUnichar firstChar = frag->CharAt(offset);
|
|
|
|
// Eat up any discarded characters before dispatching
|
|
if (IS_DISCARDED(firstChar)) {
|
|
continue;
|
|
}
|
|
|
|
switch (mMode) {
|
|
default:
|
|
case eNormal:
|
|
if (XP_IS_SPACE(firstChar)) {
|
|
offset = ScanNormalWhiteSpace_B();
|
|
wordLen = 1;
|
|
isWhitespace = PR_TRUE;
|
|
}
|
|
else if (frag->Is2b()) {
|
|
offset = ScanNormalUnicodeText_B(aForLineBreak, &wordLen);
|
|
}
|
|
else {
|
|
offset = ScanNormalAsciiText_B(&wordLen);
|
|
}
|
|
break;
|
|
|
|
case ePreformatted:
|
|
if (('\n' == firstChar) || ('\t' == firstChar)) {
|
|
mTransformBuf.mBuffer[mTransformBuf.mBufferLen-1] = firstChar;
|
|
offset--; // make sure we overshoot
|
|
wordLen = 1;
|
|
isWhitespace = PR_TRUE;
|
|
}
|
|
else {
|
|
offset = ScanPreData_B(&wordLen);
|
|
}
|
|
break;
|
|
|
|
case ePreWrap:
|
|
if (XP_IS_SPACE(firstChar)) {
|
|
if (('\n' == firstChar) || ('\t' == firstChar)) {
|
|
mTransformBuf.mBuffer[mTransformBuf.mBufferLen-1] = firstChar;
|
|
offset--; // make sure we overshoot
|
|
wordLen = 1;
|
|
}
|
|
else {
|
|
offset = ScanPreWrapWhiteSpace_B(&wordLen);
|
|
}
|
|
isWhitespace = PR_TRUE;
|
|
}
|
|
else if (frag->Is2b()) {
|
|
offset = ScanNormalUnicodeText_B(aForLineBreak, &wordLen);
|
|
}
|
|
else {
|
|
offset = ScanNormalAsciiText_B(&wordLen);
|
|
}
|
|
break;
|
|
}
|
|
|
|
// Backwards scanning routines *always* overshoot by one for the
|
|
// returned offset value.
|
|
offset = offset + 1;
|
|
|
|
result = mTransformBuf.GetBufferEnd() - wordLen;
|
|
|
|
if (!isWhitespace) {
|
|
switch (mTextTransform) {
|
|
case NS_STYLE_TEXT_TRANSFORM_CAPITALIZE:
|
|
gCaseConv->ToTitle(result, result, wordLen, !aInWord);
|
|
break;
|
|
case NS_STYLE_TEXT_TRANSFORM_LOWERCASE:
|
|
gCaseConv->ToLower(result, result, wordLen);
|
|
break;
|
|
case NS_STYLE_TEXT_TRANSFORM_UPPERCASE:
|
|
gCaseConv->ToUpper(result, result, wordLen);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
*aWordLenResult = wordLen;
|
|
*aContentLenResult = mOffset - offset;
|
|
*aIsWhiteSpaceResult = isWhitespace;
|
|
|
|
mOffset = offset;
|
|
|
|
return result;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
// Self test logic for this class. This will (hopefully) make sure
|
|
// that the forward and backward word iterator methods continue to
|
|
// function as people change things...
|
|
|
|
#ifdef DEBUG
|
|
struct SelfTestSection {
|
|
int length;
|
|
int* data;
|
|
};
|
|
|
|
#define NUM_MODES 3
|
|
|
|
struct SelfTestData {
|
|
const PRUnichar* text;
|
|
SelfTestSection modes[NUM_MODES];
|
|
};
|
|
|
|
static PRUint8 preModeValue[NUM_MODES] = {
|
|
NS_STYLE_WHITESPACE_NORMAL,
|
|
NS_STYLE_WHITESPACE_PRE,
|
|
NS_STYLE_WHITESPACE_MOZ_PRE_WRAP
|
|
};
|
|
|
|
static PRUnichar test1text[] = {
|
|
'o', 'n', 'c', 'e', ' ', 'u', 'p', 'o', 'n', '\t',
|
|
'a', ' ', 's', 'h', 'o', 'r', 't', ' ', 't', 'i', 'm', 'e', 0
|
|
};
|
|
static int test1Results[] = { 4, 1, 4, 1, 1, 1, 5, 1, 4 };
|
|
static int test1PreResults[] = { 9, 1, 12 };
|
|
static int test1PreWrapResults[] = { 4, 1, 4, 1, 1, 1, 5, 1, 4 };
|
|
|
|
static PRUnichar test2text[] = {
|
|
0xF6, 'n', 'c', 'e', ' ', 0xFB, 'p', 'o', 'n', '\t',
|
|
0xE3, ' ', 's', 'h', 0xF3, 'r', 't', ' ', 't', 0xEE, 'm', 'e', ' ', 0
|
|
};
|
|
static int test2Results[] = { 4, 1, 4, 1, 1, 1, 5, 1, 4, 1 };
|
|
static int test2PreResults[] = { 9, 1, 13 };
|
|
static int test2PreWrapResults[] = { 4, 1, 4, 1, 1, 1, 5, 1, 4, 1 };
|
|
|
|
static PRUnichar test3text[] = {
|
|
0x0152, 'n', 'c', 'e', ' ', 'x', 'y', '\t', 'z', 'y', ' ', 0
|
|
};
|
|
static int test3Results[] = { 4, 1, 2, 1, 2, 1, };
|
|
static int test3PreResults[] = { 7, 1, 3, };
|
|
static int test3PreWrapResults[] = { 4, 1, 2, 1, 2, 1, };
|
|
|
|
static PRUnichar test4text[] = {
|
|
'o', 'n', CH_SHY, 'c', 'e', ' ', CH_SHY, ' ', 'u', 'p', 'o', 'n', '\t',
|
|
'a', ' ', 's', 'h', 'o', 'r', 't', ' ', 't', 'i', 'm', 'e', 0
|
|
};
|
|
static int test4Results[] = { 4, 1, 4, 1, 1, 1, 5, 1, 4 };
|
|
static int test4PreResults[] = { 10, 1, 12 };
|
|
static int test4PreWrapResults[] = { 4, 2, 4, 1, 1, 1, 5, 1, 4 };
|
|
|
|
static PRUnichar test5text[] = {
|
|
CH_SHY, 0
|
|
};
|
|
static int test5Results[] = { 0 };
|
|
static int test5PreResults[] = { 0 };
|
|
static int test5PreWrapResults[] = { 0 };
|
|
|
|
#if 0
|
|
static PRUnichar test6text[] = {
|
|
0x30d5, 0x30b8, 0x30c6, 0x30ec, 0x30d3, 0x306e, 0x97f3, 0x697d,
|
|
0x756a, 0x7d44, 0x300c, 'H', 'E', 'Y', '!', ' ', 'H', 'E', 'Y', '!',
|
|
'\t', 'H', 'E', 'Y', '!', 0x300d, 0x306e, 0x30db, 0x30fc, 0x30e0,
|
|
0x30da, 0x30fc, 0x30b8, 0x3002, 0
|
|
};
|
|
static int test6Results[] = { 1, 1, 1, 1, 1,
|
|
1, 1, 1, 1, 1,
|
|
5, 1, 4, 1, 5,
|
|
1, 2, 1, 2, 2 };
|
|
static int test6PreResults[] = { 20, 1, 13 };
|
|
static int test6PreWrapResults[] = { 1, 1, 1, 1, 1,
|
|
1, 1, 1, 1, 1,
|
|
5, 1, 4, 1, 5,
|
|
1, 2, 1, 2, 2 };
|
|
#endif
|
|
|
|
static SelfTestData tests[] = {
|
|
{ test1text,
|
|
{ { sizeof(test1Results)/sizeof(int), test1Results, },
|
|
{ sizeof(test1PreResults)/sizeof(int), test1PreResults, },
|
|
{ sizeof(test1PreWrapResults)/sizeof(int), test1PreWrapResults, } }
|
|
},
|
|
{ test2text,
|
|
{ { sizeof(test2Results)/sizeof(int), test2Results, },
|
|
{ sizeof(test2PreResults)/sizeof(int), test2PreResults, },
|
|
{ sizeof(test2PreWrapResults)/sizeof(int), test2PreWrapResults, } }
|
|
},
|
|
{ test3text,
|
|
{ { sizeof(test3Results)/sizeof(int), test3Results, },
|
|
{ sizeof(test3PreResults)/sizeof(int), test3PreResults, },
|
|
{ sizeof(test3PreWrapResults)/sizeof(int), test3PreWrapResults, } }
|
|
},
|
|
{ test4text,
|
|
{ { sizeof(test4Results)/sizeof(int), test4Results, },
|
|
{ sizeof(test4PreResults)/sizeof(int), test4PreResults, },
|
|
{ sizeof(test4PreWrapResults)/sizeof(int), test4PreWrapResults, } }
|
|
},
|
|
{ test5text,
|
|
{ { sizeof(test5Results)/sizeof(int), test5Results, },
|
|
{ sizeof(test5PreResults)/sizeof(int), test5PreResults, },
|
|
{ sizeof(test5PreWrapResults)/sizeof(int), test5PreWrapResults, } }
|
|
},
|
|
#if 0
|
|
{ test6text,
|
|
{ { sizeof(test6Results)/sizeof(int), test6Results, },
|
|
{ sizeof(test6PreResults)/sizeof(int), test6PreResults, },
|
|
{ sizeof(test6PreWrapResults)/sizeof(int), test6PreWrapResults, } }
|
|
},
|
|
#endif
|
|
};
|
|
|
|
#define NUM_TESTS (sizeof(tests) / sizeof(tests[0]))
|
|
|
|
void
|
|
nsTextTransformer::SelfTest(nsILineBreaker* aLineBreaker,
|
|
nsIWordBreaker* aWordBreaker)
|
|
{
|
|
PRBool gNoisy = PR_FALSE;
|
|
if (PR_GetEnv("GECKO_TEXT_TRANSFORMER_NOISY_SELF_TEST")) {
|
|
gNoisy = PR_TRUE;
|
|
}
|
|
|
|
PRBool error = PR_FALSE;
|
|
PRInt32 testNum = 0;
|
|
SelfTestData* st = tests;
|
|
SelfTestData* last = st + NUM_TESTS;
|
|
for (; st < last; st++) {
|
|
PRUnichar* bp;
|
|
PRInt32 wordLen, contentLen;
|
|
PRBool ws;
|
|
|
|
PRBool isAsciiTest = PR_TRUE;
|
|
const PRUnichar* cp = st->text;
|
|
while (*cp) {
|
|
if (*cp > 255) {
|
|
isAsciiTest = PR_FALSE;
|
|
break;
|
|
}
|
|
cp++;
|
|
}
|
|
|
|
nsTextFragment frag(st->text);
|
|
nsTextTransformer tx(aLineBreaker, aWordBreaker);
|
|
|
|
for (PRInt32 preMode = 0; preMode < NUM_MODES; preMode++) {
|
|
// Do forwards test
|
|
if (gNoisy) {
|
|
nsAutoString uc2(st->text);
|
|
printf("%s forwards test: '", isAsciiTest ? "ascii" : "unicode");
|
|
fputs(uc2, stdout);
|
|
printf("'\n");
|
|
}
|
|
tx.Init2(&frag, 0, preModeValue[preMode], NS_STYLE_TEXT_TRANSFORM_NONE);
|
|
|
|
int* expectedResults = st->modes[preMode].data;
|
|
int resultsLen = st->modes[preMode].length;
|
|
|
|
while ((bp = tx.GetNextWord(PR_FALSE, &wordLen, &contentLen, &ws))) {
|
|
if (gNoisy) {
|
|
nsAutoString tmp(bp, wordLen);
|
|
printf(" '");
|
|
fputs(tmp, stdout);
|
|
printf("': ws=%s wordLen=%d (%d) contentLen=%d (offset=%d)\n",
|
|
ws ? "yes" : "no",
|
|
wordLen, *expectedResults, contentLen, tx.mOffset);
|
|
}
|
|
if (*expectedResults != wordLen) {
|
|
error = PR_TRUE;
|
|
break;
|
|
}
|
|
expectedResults++;
|
|
}
|
|
if (expectedResults != st->modes[preMode].data + resultsLen) {
|
|
if (st->modes[preMode].data[0] != 0) {
|
|
error = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
// Do backwards test
|
|
if (gNoisy) {
|
|
nsAutoString uc2(st->text);
|
|
printf("%s backwards test: '", isAsciiTest ? "ascii" : "unicode");
|
|
fputs(uc2, stdout);
|
|
printf("'\n");
|
|
}
|
|
tx.Init2(&frag, frag.GetLength(), NS_STYLE_WHITESPACE_NORMAL,
|
|
NS_STYLE_TEXT_TRANSFORM_NONE);
|
|
expectedResults = st->modes[preMode].data + resultsLen;
|
|
while ((bp = tx.GetPrevWord(PR_FALSE, &wordLen, &contentLen, &ws))) {
|
|
--expectedResults;
|
|
if (gNoisy) {
|
|
nsAutoString tmp(bp, wordLen);
|
|
printf(" '");
|
|
fputs(tmp, stdout);
|
|
printf("': ws=%s wordLen=%d contentLen=%d (offset=%d)\n",
|
|
ws ? "yes" : "no",
|
|
wordLen, contentLen, tx.mOffset);
|
|
}
|
|
if (*expectedResults != wordLen) {
|
|
error = PR_TRUE;
|
|
break;
|
|
}
|
|
}
|
|
if (expectedResults != st->modes[preMode].data) {
|
|
if (st->modes[preMode].data[0] != 0) {
|
|
error = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
if (error) {
|
|
fprintf(stderr, "nsTextTransformer: self test %d failed\n", testNum);
|
|
}
|
|
testNum++;
|
|
}
|
|
}
|
|
if (error) {
|
|
NS_ABORT();
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsTextTransformer::Init2(const nsTextFragment* aFrag,
|
|
PRInt32 aStartingOffset,
|
|
PRUint8 aWhiteSpace,
|
|
PRUint8 aTextTransform)
|
|
{
|
|
mFrag = aFrag;
|
|
|
|
// Sanitize aStartingOffset
|
|
if (NS_WARN_IF_FALSE(aStartingOffset >= 0, "bad starting offset")) {
|
|
aStartingOffset = 0;
|
|
}
|
|
else if (NS_WARN_IF_FALSE(aStartingOffset <= mFrag->GetLength(),
|
|
"bad starting offset")) {
|
|
aStartingOffset = mFrag->GetLength();
|
|
}
|
|
mOffset = aStartingOffset;
|
|
|
|
// Get the frames text style information
|
|
if (NS_STYLE_WHITESPACE_PRE == aWhiteSpace) {
|
|
mMode = ePreformatted;
|
|
}
|
|
else if (NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == aWhiteSpace) {
|
|
mMode = ePreWrap;
|
|
}
|
|
mTextTransform = aTextTransform;
|
|
|
|
return NS_OK;
|
|
}
|
|
#endif /* DEBUG */
|