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https://github.com/fadden/ciderpress.git
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8f61f84585
Much of what the "reformat" code does involves processing data that is 8, 16, or 32 bits. We want to use size-specific types from stdint.h (e.g. uint16_t) rather than "unsigned short". This was a quick pass to replace the various "unsigned" declarations. More can be done here and elsewhere.
421 lines
12 KiB
C++
421 lines
12 KiB
C++
/*
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* CiderPress
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* Copyright (C) 2007 by faddenSoft, LLC. All Rights Reserved.
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* See the file LICENSE for distribution terms.
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*/
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/*
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* Reformat "generic" GWP and Teach files.
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*/
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#include "StdAfx.h"
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#include "Teach.h"
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#include "ResourceFork.h"
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/*
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* ==========================================================================
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* ReformatGWP
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* ==========================================================================
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*/
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/*
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* Decide whether or not we want to treat this file as a "generic" IIgs
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* document. Possibly useful for converting the special characters. We'll
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* activate it for any GWP file other than the two known types.
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*/
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void
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ReformatGWP::Examine(ReformatHolder* pHolder)
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{
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ReformatHolder::ReformatApplies applies = ReformatHolder::kApplicNot;
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if (pHolder->GetFileType() == kTypeGWP &&
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(pHolder->GetAuxType() != 0x5445 && pHolder->GetAuxType() != 0x8010))
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{
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applies = ReformatHolder::kApplicProbably;
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}
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pHolder->SetApplic(ReformatHolder::kReformatGWP, applies,
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ReformatHolder::kApplicNot, ReformatHolder::kApplicNot);
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}
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/*
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* Convert GWP into formatted text.
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*/
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int
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ReformatGWP::Process(const ReformatHolder* pHolder,
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ReformatHolder::ReformatID id, ReformatHolder::ReformatPart part,
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ReformatOutput* pOutput)
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{
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const uint8_t* srcBuf = pHolder->GetSourceBuf(part);
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long srcLen = pHolder->GetSourceLen(part);
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fUseRTF = false;
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CheckGSCharConv();
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RTFBegin();
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/* convert EOL markers and IIgs characters */
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uint8_t ch;
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while (srcLen) {
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ch = *srcBuf++;
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srcLen--;
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if (ch == '\r') {
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/* got CR, check for CRLF -- not really expected on IIgs */
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if (srcLen != 0 && *srcBuf == '\n') {
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srcBuf++;
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srcLen--;
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}
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BufPrintf("\r\n");
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} else if (ch == '\n') {
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BufPrintf("\r\n");
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} else {
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// RTF is always off, so just use BufPrintf
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BufPrintf("%c", ConvertGSChar(ch));
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}
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}
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RTFEnd();
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SetResultBuffer(pOutput);
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return 0;
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}
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/*
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* ==========================================================================
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* ReformatTeach
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* ==========================================================================
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*/
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/*
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* Decide whether or not we want to handle this file.
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*/
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void
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ReformatTeach::Examine(ReformatHolder* pHolder)
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{
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ReformatHolder::ReformatApplies applies = ReformatHolder::kApplicNot;
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if (pHolder->GetFileType() == kTypeGWP && pHolder->GetAuxType() == 0x5445)
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applies = ReformatHolder::kApplicYes;
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pHolder->SetApplic(ReformatHolder::kReformatTeach, applies,
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ReformatHolder::kApplicNot, ReformatHolder::kApplicNot);
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}
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/*
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* Convert Teach Text into formatted text.
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*
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* The text is in the data fork and the formatting is in the resource fork.
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*/
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int
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ReformatTeach::Process(const ReformatHolder* pHolder,
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ReformatHolder::ReformatID id, ReformatHolder::ReformatPart part,
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ReformatOutput* pOutput)
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{
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const uint8_t* dataBuf;
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const uint8_t* rsrcBuf;
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long dataLen, rsrcLen;
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const uint8_t* styleBlock;
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long styleLen;
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if (part != ReformatHolder::kPartData)
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return -1;
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dataBuf = pHolder->GetSourceBuf(ReformatHolder::kPartData);
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dataLen = pHolder->GetSourceLen(ReformatHolder::kPartData);
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rsrcBuf = pHolder->GetSourceBuf(ReformatHolder::kPartRsrc);
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rsrcLen = pHolder->GetSourceLen(ReformatHolder::kPartRsrc);
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if (dataBuf == NULL || rsrcBuf == NULL || dataLen <= 0 || rsrcLen <= 0) {
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LOGI("Teach reformatter missing one fork of the file");
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return -1;
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}
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CheckGSCharConv();
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/* find the rStyleBlock */
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if (!ReformatResourceFork::GetResource(rsrcBuf, rsrcLen, 0x8012, 0x0001,
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&styleBlock, &styleLen))
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{
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LOGI("Resource fork of Teach Text file not found");
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return -1;
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}
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RStyleBlock rStyleBlock;
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if (!rStyleBlock.Create(styleBlock, styleLen)) {
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LOGI("Unable to unpack rStyleBlock");
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return -1;
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}
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fUseRTF = true;
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RTFBegin();
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/*
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* Configure ruler options. The format allows us to have more than one
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* ruler, but doesn't provide a way to select between them, so we have
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* to assume that the first ruler is global.
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*
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* In practice, the Teach application doesn't provide a way to set
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* margins or tab stops, so there's really not much to do. It seems to
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* create tab stops with 64-pixel widths, which translates to 10 tab
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* stops per page. WordPad seems to default to 12, so I figure there's
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* not much point in futzing with it since the fonts are all different
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* anyway.
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*/
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RStyleBlock::TERuler* pRuler = rStyleBlock.GetRuler(0);
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assert(pRuler != NULL);
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if (pRuler->GetJustification() != RStyleBlock::TERuler::kJustLeft) {
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LOGI("WARNING: not using left justified Teach text");
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/* ignore it */
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}
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for (int style = 0; style < rStyleBlock.GetNumStyleItems(); style++) {
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RStyleBlock::StyleItem* pStyleItem;
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RStyleBlock::TEStyle* pStyle;
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int numBytes;
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/* set up the style */
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pStyleItem = rStyleBlock.GetStyleItem(style);
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assert(pStyleItem != NULL);
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if (pStyleItem->GetLength() == RStyleBlock::StyleItem::kUnusedItem)
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continue;
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numBytes = pStyleItem->GetLength();
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pStyle = rStyleBlock.GetStyle(pStyleItem->GetStyleIndex());
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/*
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* Set the font first; that defines the point size multiplier. Set
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* the size second, because the point size determines whether we
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* show underline. Set the style last.
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*/
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RTFSetGSFont(pStyle->GetFontFamily());
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RTFSetGSFontSize(pStyle->GetFontSize());
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RTFSetGSFontStyle(pStyle->GetTextStyle());
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/*
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* The Teach app doesn't let you set text colors, but it appears
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* there's a way to do it, since the SpyHunterGS Read.Me file has
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* a bit of red in it.
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*/
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if (pStyle->GetTextColor() != 0) {
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// do something with color, someday
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}
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/* output the characters */
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uint8_t uch;
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while (numBytes--) {
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if (!dataLen) {
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LOGI("WARNING: Teach underrun (%ld wanted)", numBytes);
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break;
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}
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uch = *dataBuf;
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if (uch == '\r') {
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RTFNewPara();
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} else if (uch == '\t') {
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RTFTab();
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} else {
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RTFPrintExtChar(ConvertGSChar(uch));
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}
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dataBuf++;
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dataLen--;
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}
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}
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if (dataLen) {
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LOGI("WARNING: Teach overrun (%ld remain)", dataLen);
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/* no big deal */
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}
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RTFEnd();
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SetResultBuffer(pOutput, true);
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return 0;
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}
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/*
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* ==========================================================================
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* RStyleBlock functions
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* ==========================================================================
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*/
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/*
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* Unpack an rStyleBlock resource.
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*/
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bool
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RStyleBlock::Create(const uint8_t* buf, long len)
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{
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uint16_t version;
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uint32_t partLen;
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int i;
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assert(buf != NULL);
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if (len < kMinLen) {
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LOGI("Too short to be rStyleBlock (%d)", len);
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return false;
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}
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version = Reformat::Read16(&buf, &len);
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if (version != kExpectedVersion) {
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LOGI("Bad rStyleBlock version (%d)", version);
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return false;
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}
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/* extract ruler(s) */
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partLen = Reformat::Read32(&buf, &len);
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if (partLen > (uint32_t) (len+8)) {
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/* not enough to satisfy data + two more counts */
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LOGI("Invalid part1 length (%d vs %d)", partLen, len);
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return false;
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}
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fNumRulers = 1;
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fpRulers = new TERuler[fNumRulers];
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if (fpRulers == NULL)
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return false;
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if (fpRulers->Create(buf, partLen) <= 0)
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return false;
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buf += partLen;
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len -= partLen;
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/* extract TEStyles */
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partLen = Reformat::Read32(&buf, &len);
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if (partLen > (uint32_t) (len + 4)) {
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LOGI("Invalid part2 length (%d vs %d)", partLen, len);
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return false;
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}
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if ((partLen % TEStyle::kDataLen) != 0) {
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LOGI("Invalid part2 length (%d mod %d)",
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partLen, TEStyle::kDataLen);
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return false;
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}
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fNumStyles = partLen / TEStyle::kDataLen;
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fpStyles = new TEStyle[fNumStyles];
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if (fpStyles == NULL)
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return false;
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for (i = 0; i < fNumStyles; i++) {
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fpStyles[i].Create(buf);
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buf += TEStyle::kDataLen;
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len -= TEStyle::kDataLen;
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}
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/* extract StyleItems */
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fNumStyleItems = (int) Reformat::Read32(&buf, &len);
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partLen = fNumStyleItems * StyleItem::kItemDataLen;
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if (partLen > (uint32_t) len) {
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LOGI("Invalid part3 length (%d vs %d)", partLen, len);
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return false;
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}
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fpStyleItems = new StyleItem[fNumStyleItems];
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if (fpStyleItems == NULL)
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return false;
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for (i = 0; i < fNumStyleItems; i++) {
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fpStyleItems[i].Create(buf);
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if ((fpStyleItems[i].GetOffset() % TEStyle::kDataLen) != 0) {
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LOGI("Invalid offset %d (mod %d)",
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fpStyleItems[i].GetOffset(), TEStyle::kDataLen);
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return false;
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}
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buf += StyleItem::kItemDataLen;
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len -= StyleItem::kItemDataLen;
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}
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if (len != 0) {
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LOGI("WARNING: at end of rStyleBlock, len is %ld", len);
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}
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return true;
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}
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/*
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* Construct a TERuler from a chunk of data.
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*
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* Returns the #of bytes consumed, or -1 on failure.
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*/
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int
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RStyleBlock::TERuler::Create(const uint8_t* buf, long len)
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{
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long origLen = len;
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if (len < kMinLen)
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return -1;
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fLeftMargin = Reformat::Get16LE(buf);
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fLeftIndent = Reformat::Get16LE(buf + 2);
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fRightMargin = Reformat::Get16LE(buf + 4);
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fJust = Reformat::Get16LE(buf + 6);
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fExtraLS = Reformat::Get16LE(buf + 8);
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fFlags = Reformat::Get16LE(buf + 10);
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fUserData = Reformat::Get32LE(buf + 12);
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fTabType = Reformat::Get16LE(buf + 16);
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buf += 18;
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len -= 18;
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/*
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* What we do now depends on the value of fTabType:
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* 0: no tabs are set, there's nothing else to read.
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* 1: regularly-spaced tabs; spacing defined by fTabTerminator field.
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* 2: irregular tabs, defined by array terminated by 0xffff in the
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* fTabTerminator field.
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*
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* At present we're just throwing the tab array out.
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*/
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switch (fTabType) {
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case 0:
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fTabTerminator = 0;
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break;
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case 1:
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fTabTerminator = Reformat::Get16LE(buf);
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buf += 2;
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len -= 2;
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break;
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case 2:
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while (len >= 2) {
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TabItem tabItem;
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tabItem.tabKind = Reformat::Get16LE(buf);
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buf += 2;
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len -= 2;
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if (tabItem.tabKind == kTabArrayEnd || len < 2)
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break;
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tabItem.tabData = Reformat::Get16LE(buf);
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buf += 2;
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len -= 2;
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}
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break;
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default:
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LOGI("Invalid tab type %d", fTabType);
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return -1;
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}
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LOGI("TERuler consumed %ld bytes (%ld left over)", origLen - len, len);
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return origLen - len;
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}
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/*
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* Extract a TEStyle object from the buffer.
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*/
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void
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RStyleBlock::TEStyle::Create(const uint8_t* buf)
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{
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fFontID = Reformat::Get32LE(buf);
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fForeColor = Reformat::Get16LE(buf + 4);
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fBackColor = Reformat::Get16LE(buf + 6);
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fUserData = Reformat::Get32LE(buf + 8);
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LOGI(" TEStyle: font fam=0x%04x size=%-2d style=0x%02x fore=0x%04x",
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GetFontFamily(), GetFontSize(), GetTextStyle(), fForeColor);
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}
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/*
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* Extract a StyleItem object from the buffer.
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*/
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void
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RStyleBlock::StyleItem::Create(const uint8_t* buf)
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{
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fLength = Reformat::Get32LE(buf);
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fOffset = Reformat::Get32LE(buf + 4);
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LOGI(" StyleItem: len=%ld off=%ld", fLength, fOffset);
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}
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