pdfviewer: 1) debug code for drawText (show magenta background for text, to show text even when we fail to load/show it), 2) some cleanup: refactor and rename classes and files
Review URL: https://codereview.chromium.org/23020003
git-svn-id: http://skia.googlecode.com/svn/trunk@10716 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/PdfViewer/pdfparser/native/SkPdfNativeDoc.h b/experimental/PdfViewer/pdfparser/native/SkPdfNativeDoc.h
new file mode 100644
index 0000000..5f22c42
--- /dev/null
+++ b/experimental/PdfViewer/pdfparser/native/SkPdfNativeDoc.h
@@ -0,0 +1,105 @@
+#ifndef EXPERIMENTAL_PDFVIEWER_PDFPARSER_NATIVE_SKNATIVEPARSEDPDF_H_
+#define EXPERIMENTAL_PDFVIEWER_PDFPARSER_NATIVE_SKNATIVEPARSEDPDF_H_
+
+#include "SkRect.h"
+#include "SkTDArray.h"
+
+class SkCanvas;
+
+class SkPdfAllocator;
+class SkPdfMapper;
+class SkPdfNativeObject;
+class SkPdfReal;
+class SkPdfInteger;
+class SkPdfString;
+class SkPdfResourceDictionary;
+class SkPdfCatalogDictionary;
+class SkPdfPageObjectDictionary;
+class SkPdfPageTreeNodeDictionary;
+
+class SkPdfNativeTokenizer;
+
+class SkStream;
+
+class SkPdfNativeDoc {
+private:
+ struct PublicObjectEntry {
+ long fOffset;
+ // long endOffset; // TODO(edisonn): determine the end of the object, to be used when the doc is corrupted
+ SkPdfNativeObject* fObj;
+ // TODO(edisonn): perf ... probably it does not make sense to cache the ref. test it!
+ SkPdfNativeObject* fResolvedReference;
+ };
+
+public:
+ // TODO(edisonn): read methods: file, stream, http(s)://url, url with seek?
+ // TODO(edisonn): read first page asap, linearized
+ // TODO(edisonn): read page N asap, read all file
+ // TODO(edisonn): allow corruptions of file (e.g. missing endobj, missing stream length, ...)
+ // TODO(edisonn): encryption
+
+ SkPdfNativeDoc(const char* path);
+ SkPdfNativeDoc(SkStream* stream);
+
+ ~SkPdfNativeDoc();
+
+ int pages() const;
+ SkPdfResourceDictionary* pageResources(int page);
+ SkRect MediaBox(int page);
+ SkPdfNativeTokenizer* tokenizerOfPage(int n, SkPdfAllocator* allocator);
+
+ SkPdfNativeTokenizer* tokenizerOfStream(SkPdfNativeObject* stream, SkPdfAllocator* allocator);
+ SkPdfNativeTokenizer* tokenizerOfBuffer(const unsigned char* buffer, size_t len,
+ SkPdfAllocator* allocator);
+
+ size_t objects() const;
+ SkPdfNativeObject* object(int i);
+ SkPdfPageObjectDictionary* page(int page);
+
+ const SkPdfMapper* mapper() const;
+ SkPdfAllocator* allocator() const;
+
+ SkPdfReal* createReal(double value) const;
+ SkPdfInteger* createInteger(int value) const;
+ // the string does not own the char*
+ SkPdfString* createString(const unsigned char* sz, size_t len) const;
+
+ SkPdfNativeObject* resolveReference(SkPdfNativeObject* ref);
+
+ // Reports an approximation of all the memory usage.
+ size_t bytesUsed() const;
+
+private:
+
+ // Takes ownership of bytes.
+ void init(const void* bytes, size_t length);
+ void loadWithoutXRef();
+
+ const unsigned char* readCrossReferenceSection(const unsigned char* xrefStart, const unsigned char* trailerEnd);
+ const unsigned char* readTrailer(const unsigned char* trailerStart, const unsigned char* trailerEnd, bool storeCatalog, long* prev, bool skipKeyword);
+
+ // TODO(edisonn): updates not supported right now, generation ignored
+ void addCrossSectionInfo(int id, int generation, int offset, bool isFreed);
+ static void reset(PublicObjectEntry* obj) {
+ obj->fObj = NULL;
+ obj->fResolvedReference = NULL;
+ obj->fOffset = -1;
+ }
+
+ SkPdfNativeObject* readObject(int id/*, int generation*/);
+
+ void fillPages(SkPdfPageTreeNodeDictionary* tree);
+
+ // private fields
+ SkPdfAllocator* fAllocator;
+ SkPdfMapper* fMapper;
+ const unsigned char* fFileContent;
+ size_t fContentLength;
+ SkPdfNativeObject* fRootCatalogRef;
+ SkPdfCatalogDictionary* fRootCatalog;
+
+ mutable SkTDArray<PublicObjectEntry> fObjects;
+ SkTDArray<SkPdfPageObjectDictionary*> fPages;
+};
+
+#endif // EXPERIMENTAL_PDFVIEWER_PDFPARSER_NATIVE_SKNATIVEPARSEDPDF_H_