9e96eff17d
liked by it. so what I did was remove 2 instances of "for (int i = <blah>" and replaced it with "int i; <blah> for (i = <blah>" git-svn-id: svn://10.0.0.236/trunk@103092 18797224-902f-48f8-a5cc-f745e15eee43
299 lines
8.6 KiB
C++
299 lines
8.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* ucvth : nsUnicodeToTIS620.h
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*
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* The contents of this file are subject to the Mozilla 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/MPL/
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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.org code.
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* The Initial Developer of the Original Code is Sun Microsystems,
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* Inc. Portions created by SUN are Copyright (C) 2000 SUN
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* Microsystems, Inc. All Rights Reserved.
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*
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* This module ucvth is based on the Thai Shaper in Pango by
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* Red Hat Software. Portions created by Redhat are Copyright (C)
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* 1999 Red Hat Software.
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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 "nsIServiceManager.h"
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#include "nsICharsetConverterManager.h"
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#include "nsICharsetConverterManager2.h"
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#include "nsILanguageAtomService.h"
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#include "nsCtlCIID.h"
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#include "nsILE.h"
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#include "nsULE.h"
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#include "nsUnicodeToTIS620.h"
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static NS_DEFINE_CID(kCharSetManagerCID, NS_ICHARSETCONVERTERMANAGER_CID);
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// XPCOM stuff
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NS_IMPL_ADDREF(nsUnicodeToTIS620);
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NS_IMPL_RELEASE(nsUnicodeToTIS620);
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PRInt32
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nsUnicodeToTIS620::Itemize(const PRUnichar* aSrcBuf, PRInt32 aSrcLen, textRunList *aRunList)
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{
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int ct = 0, start = 0;
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PRBool isTis = PR_FALSE;
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struct textRun *tmpChunk;
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// Handle Simple Case Now : Multiple Ranges later
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PRUnichar thaiBeg = 3585; // U+0x0E01;
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PRUnichar thaiEnd = 3675; // U+0x0E5b
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for (ct = 0; ct < aSrcLen;) {
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tmpChunk = new textRun;
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if (aRunList->numRuns == 0)
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aRunList->head = tmpChunk;
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else
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aRunList->cur->next = tmpChunk;
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aRunList->cur = tmpChunk;
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aRunList->numRuns++;
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tmpChunk->start = &aSrcBuf[ct];
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start = ct;
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isTis = (aSrcBuf[ct] >= thaiBeg && aSrcBuf[ct] <= thaiEnd);
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if (isTis) {
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while (isTis && ct < aSrcLen) {
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isTis = (aSrcBuf[ct] >= thaiBeg && aSrcBuf[ct] <= thaiEnd);
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if (isTis)
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ct++;
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}
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tmpChunk->isOther = PR_FALSE;
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}
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else {
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while (!isTis && ct < aSrcLen) {
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isTis = (aSrcBuf[ct] >= thaiBeg && aSrcBuf[ct] <= thaiEnd);
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if (!isTis)
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ct++;
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}
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tmpChunk->isOther = PR_TRUE;
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}
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tmpChunk->length = ct - start;
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}
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return (PRInt32)aRunList->numRuns;
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}
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nsresult nsUnicodeToTIS620::QueryInterface(REFNSIID aIID, void** aInstancePtr)
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{
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if (NULL == aInstancePtr)
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return NS_ERROR_NULL_POINTER;
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*aInstancePtr = NULL;
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static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
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if (aIID.Equals(NS_GET_IID(nsIUnicodeEncoder))) {
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*aInstancePtr = (void*) ((nsIUnicodeEncoder*)this);
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NS_ADDREF_THIS();
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return NS_OK;
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}
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if (aIID.Equals(NS_GET_IID(nsICharRepresentable))) {
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*aInstancePtr = (void*) ((nsICharRepresentable*)this);
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NS_ADDREF_THIS();
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return NS_OK;
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}
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if (aIID.Equals(kISupportsIID)) {
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*aInstancePtr = (void*) ((nsISupports*)((nsIUnicodeEncoder*)this));
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NS_ADDREF_THIS();
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return NS_OK;
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}
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return NS_NOINTERFACE;
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}
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NS_IMETHODIMP nsUnicodeToTIS620::SetOutputErrorBehavior(PRInt32 aBehavior,
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nsIUnicharEncoder * aEncoder,
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PRUnichar aChar)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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// constructor and destroctor
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nsUnicodeToTIS620::nsUnicodeToTIS620()
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{
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static NS_DEFINE_CID(kLECID, NS_ULE_CID);
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nsresult rv;
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NS_INIT_REFCNT();
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mCtlObj = do_CreateInstance(kLECID, &rv);
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if (NS_FAILED(rv)) {
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#ifdef DEBUG_prabhat
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// No other error handling needed here since we
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// handle absence of mCtlObj in Convert
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printf("ERROR: Cannot create instance of component " NS_ULE_PROGID " [%x].\n",
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rv);
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#endif
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NS_WARNING("Thai Text Layout Will Not Be Supported\n");
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mCtlObj = nsnull;
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}
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}
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nsUnicodeToTIS620::~nsUnicodeToTIS620()
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{
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// Maybe convert nsILE to a service
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// No NS_IF_RELEASE(mCtlObj) of nsCOMPtr;
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}
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/*
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* This method converts the unicode to this font index.
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* Note: ConversionBufferFullException is not handled
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* since this class is only used for character display.
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*/
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NS_IMETHODIMP nsUnicodeToTIS620::Convert(const PRUnichar* input,
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PRInt32* aSrcLength,
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char* output,
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PRInt32* aDestLength)
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{
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textRunList txtRuns;
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textRun *aPtr, *aTmpPtr;
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int i;
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#ifdef DEBUG_prabhath_no_shaper
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printf("Debug/Test Case of No thai pango shaper Object\n");
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// Comment out mCtlObj == nsnull for test purposes
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#endif
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if (mCtlObj == nsnull) {
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nsICharsetConverterManager2* gCharSetManager = nsnull;
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nsIUnicodeEncoder* gDefaultTISConverter = nsnull;
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nsresult res;
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nsServiceManager::GetService(kCharSetManagerCID,
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NS_GET_IID(nsICharsetConverterManager2), (nsISupports**) &gCharSetManager);
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#ifdef DEBUG_prabhath
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printf("ERROR: No CTL IMPLEMENTATION - Default Thai Conversion");
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// CP874 is the default converter for thai ;
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// In case mCtlObj is absent (no CTL support), use it to convert.
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#endif
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if (!gCharSetManager)
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return NS_ERROR_FAILURE;
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nsCOMPtr<nsIAtom> charset = getter_AddRefs(NS_NewAtom("TIS-620"));
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if (charset)
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res = gCharSetManager->GetUnicodeEncoder(charset, &gDefaultTISConverter);
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else {
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NS_IF_RELEASE(gCharSetManager);
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return NS_ERROR_FAILURE;
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}
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if (!gDefaultTISConverter) {
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NS_WARNING("cannot get default converter for tis-620");
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NS_IF_RELEASE(gCharSetManager);
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return NS_ERROR_FAILURE;
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}
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gDefaultTISConverter->Convert(input, aSrcLength, output, aDestLength);
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NS_IF_RELEASE(gCharSetManager);
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NS_IF_RELEASE(gDefaultTISConverter);
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return NS_OK;
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}
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// CTLized shaping conversion starts here
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// No question of starting the conversion from an offset
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mCharOff = mByteOff = 0;
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txtRuns.numRuns = 0;
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Itemize(input, *aSrcLength, &txtRuns);
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aPtr = txtRuns.head;
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for (i = 0; i < txtRuns.numRuns; i++) {
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PRInt32 tmpSrcLen = aPtr->length;
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if (aPtr->isOther) {
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// PangoThaiShaper does not handle ASCII + thai in same shaper
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for (int j = 0; j < tmpSrcLen; j++)
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output[j + mByteOff] = (char)(*(aPtr->start + j));
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mByteOff += tmpSrcLen;
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}
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else {
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PRSize outLen = *aDestLength - mByteOff;
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// Charset tis620-0, tis620.2533-1, tis620.2529-1 & iso8859-11
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// are equivalent and have the same presentation forms
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// tis620-2 is hard-coded since we only generate presentation forms
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// in Windows-Stye as it is the current defacto-standard for the
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// presentation of thai content
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mCtlObj->GetPresentationForm(aPtr->start, tmpSrcLen, "tis620-2",
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&output[mByteOff], &outLen);
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mByteOff += outLen;
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}
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aPtr = aPtr->next;
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}
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// Cleanup Run Info;
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aPtr = txtRuns.head;
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for (i = 0; i < txtRuns.numRuns; i++) {
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aTmpPtr = aPtr;
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aPtr = aPtr->next;
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delete aTmpPtr;
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}
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*aDestLength = mByteOff;
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return NS_OK;
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}
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NS_IMETHODIMP nsUnicodeToTIS620::Finish(char * output, PRInt32 * aDestLength)
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{
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// Finish does'nt have to do much as Convert already flushes
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// to output buffer
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mByteOff = mCharOff = 0;
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return NS_OK;
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}
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//================================================================
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NS_IMETHODIMP nsUnicodeToTIS620::Reset()
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{
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mByteOff = mCharOff = 0;
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return NS_OK;
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}
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//================================================================
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NS_IMETHODIMP nsUnicodeToTIS620::GetMaxLength(const PRUnichar * aSrc,
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PRInt32 aSrcLength,
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PRInt32 * aDestLength)
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{
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*aDestLength = (aSrcLength + 1) * 2; // Each Thai character can generate
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// atmost two presentation forms
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return NS_OK;
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}
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//================================================================
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NS_IMETHODIMP nsUnicodeToTIS620::FillInfo(PRUint32* aInfo)
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{
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PRUint16 i;
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// 00-0x7f
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for (i = 0;i <= 0x7f; i++)
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SET_REPRESENTABLE(aInfo, i);
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// 0x0e01-0x0e7f
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for (i = 0x0e01; i <= 0xe3a; i++)
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SET_REPRESENTABLE(aInfo, i);
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// U+0E3B - U+0E3E is undefined
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// U+0E3F - U+0E5B
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for (i = 0x0e3f; i <= 0x0e5b; i++)
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SET_REPRESENTABLE(aInfo, i);
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// U+0E5C - U+0E7F Undefined
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return NS_OK;
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}
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