Diffstat (limited to 'noncore/unsupported/qpdf/xpdf/PDFDoc.cc') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | noncore/unsupported/qpdf/xpdf/PDFDoc.cc | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/noncore/unsupported/qpdf/xpdf/PDFDoc.cc b/noncore/unsupported/qpdf/xpdf/PDFDoc.cc new file mode 100644 index 0000000..4bbe9b7 --- a/dev/null +++ b/noncore/unsupported/qpdf/xpdf/PDFDoc.cc @@ -0,0 +1,251 @@ +//======================================================================== +// +// PDFDoc.cc +// +// Copyright 1996 Derek B. Noonburg +// +//======================================================================== + +#ifdef __GNUC__ +#pragma implementation +#endif + +#include <aconf.h> +#include <stdio.h> +#include <stdlib.h> +#include <stddef.h> +#include <string.h> +#include "GString.h" +#include "config.h" +#include "Page.h" +#include "Catalog.h" +#include "Stream.h" +#include "XRef.h" +#include "Link.h" +#include "OutputDev.h" +#include "Error.h" +#include "Lexer.h" +#include "Parser.h" +#include "PDFDoc.h" + +//------------------------------------------------------------------------ + +#define headerSearchSize 1024 // read this many bytes at beginning of + // file to look for '%PDF' + +//------------------------------------------------------------------------ +// PDFDoc +//------------------------------------------------------------------------ + +PDFDoc::PDFDoc(GString *fileNameA, GString *ownerPassword, + GString *userPassword, GBool printCommandsA) { + Object obj; + GString *fileName2; + + ok = gFalse; + + file = NULL; + str = NULL; + xref = NULL; + catalog = NULL; + links = NULL; + printCommands = printCommandsA; + + // try to open file + fileName = fileNameA; + fileName2 = NULL; +#ifdef VMS + if (!(file = fopen(fileName->getCString(), "rb", "ctx=stm"))) { + error(-1, "Couldn't open file '%s'", fileName->getCString()); + return; + } +#else + if (!(file = fopen(fileName->getCString(), "rb"))) { + fileName2 = fileName->copy(); + fileName2->lowerCase(); + if (!(file = fopen(fileName2->getCString(), "rb"))) { + fileName2->upperCase(); + if (!(file = fopen(fileName2->getCString(), "rb"))) { + error(-1, "Couldn't open file '%s'", fileName->getCString()); + delete fileName2; + return; + } + } + delete fileName2; + } +#endif + + // create stream + obj.initNull(); + str = new FileStream(file, 0, -1, &obj); + + ok = setup(ownerPassword, userPassword); +} + +PDFDoc::PDFDoc(BaseStream *strA, GString *ownerPassword, + GString *userPassword, GBool printCommandsA) { + ok = gFalse; + fileName = NULL; + file = NULL; + str = strA; + xref = NULL; + catalog = NULL; + links = NULL; + printCommands = printCommandsA; + ok = setup(ownerPassword, userPassword); +} + +GBool PDFDoc::setup(GString *ownerPassword, GString *userPassword) { + // check header + checkHeader(); + + // read xref table + xref = new XRef(str, ownerPassword, userPassword); + if (!xref->isOk()) { + error(-1, "Couldn't read xref table"); + return gFalse; + } + + // read catalog + catalog = new Catalog(xref, printCommands); + if (!catalog->isOk()) { + error(-1, "Couldn't read page catalog"); + return gFalse; + } + + // done + return gTrue; +} + +PDFDoc::~PDFDoc() { + if (catalog) { + delete catalog; + } + if (xref) { + delete xref; + } + if (str) { + delete str; + } + if (file) { + fclose(file); + } + if (fileName) { + delete fileName; + } + if (links) { + delete links; + } +} + +// Check for a PDF header on this stream. Skip past some garbage +// if necessary. +void PDFDoc::checkHeader() { + char hdrBuf[headerSearchSize+1]; + char *p; + int i; + + pdfVersion = 0; + for (i = 0; i < headerSearchSize; ++i) { + hdrBuf[i] = str->getChar(); + } + hdrBuf[headerSearchSize] = '\0'; + for (i = 0; i < headerSearchSize - 5; ++i) { + if (!strncmp(&hdrBuf[i], "%PDF-", 5)) { + break; + } + } + if (i >= headerSearchSize - 5) { + error(-1, "May not be a PDF file (continuing anyway)"); + return; + } + str->moveStart(i); + p = strtok(&hdrBuf[i+5], " \t\n\r"); + pdfVersion = atof(p); + if (!(hdrBuf[i+5] >= '0' && hdrBuf[i+5] <= '9') || + pdfVersion > supportedPDFVersionNum + 0.0001) { + error(-1, "PDF version %s -- xpdf supports version %s" + " (continuing anyway)", p, supportedPDFVersionStr); + } +} + +void PDFDoc::displayPage(OutputDev *out, int page, fouble zoom, + int rotate, GBool doLinks) { + Page *p; + + if (printCommands) { + printf("***** page %d *****\n", page); + } + p = catalog->getPage(page); + if (doLinks) { + if (links) { + delete links; + } + getLinks(p); + p->display(out, zoom, rotate, links, catalog); + } else { + p->display(out, zoom, rotate, NULL, catalog); + } +} + +void PDFDoc::displayPages(OutputDev *out, int firstPage, int lastPage, + int zoom, int rotate, GBool doLinks) { + int page; + + for (page = firstPage; page <= lastPage; ++page) { + displayPage(out, page, zoom, rotate, doLinks); + } +} + +GBool PDFDoc::isLinearized() { + Parser *parser; + Object obj1, obj2, obj3, obj4, obj5; + GBool lin; + + lin = gFalse; + obj1.initNull(); + parser = new Parser(xref, new Lexer(xref, str->makeSubStream(str->getStart(), + -1, &obj1))); + parser->getObj(&obj1); + parser->getObj(&obj2); + parser->getObj(&obj3); + parser->getObj(&obj4); + if (obj1.isInt() && obj2.isInt() && obj3.isCmd("obj") && + obj4.isDict()) { + obj4.dictLookup("Linearized", &obj5); + if (obj5.isNum() && obj5.getNum() > 0) { + lin = gTrue; + } + obj5.free(); + } + obj4.free(); + obj3.free(); + obj2.free(); + obj1.free(); + delete parser; + return lin; +} + +GBool PDFDoc::saveAs(GString *name) { + FILE *f; + int c; + + if (!(f = fopen(name->getCString(), "wb"))) { + error(-1, "Couldn't open file '%s'", name->getCString()); + return gFalse; + } + str->reset(); + while ((c = str->getChar()) != EOF) { + fputc(c, f); + } + str->close(); + fclose(f); + return gTrue; +} + +void PDFDoc::getLinks(Page *page) { + Object obj; + + links = new Links(page->getAnnots(&obj), catalog->getBaseURI()); + obj.free(); +} |