gfx/skia/trunk/src/pdf/SkPDFCatalog.h@129ffea94266
gfx/skia/trunk/src/pdf/SkPDFCatalog.h
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
2 /*
3 * Copyright 2010 The Android Open Source Project
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
10 #ifndef SkPDFCatalog_DEFINED
11 #define SkPDFCatalog_DEFINED
13 #include <sys/types.h>
15 #include "SkPDFDocument.h"
16 #include "SkPDFTypes.h"
17 #include "SkRefCnt.h"
18 #include "SkTDArray.h"
20 /** \class SkPDFCatalog
22 The PDF catalog manages object numbers and file offsets. It is used
23 to create the PDF cross reference table.
24 */
25 class SkPDFCatalog {
26 public:
27 /** Create a PDF catalog.
28 */
29 explicit SkPDFCatalog(SkPDFDocument::Flags flags);
30 ~SkPDFCatalog();
32 /** Add the passed object to the catalog. Refs obj.
33 * @param obj The object to add.
34 * @param onFirstPage Is the object on the first page.
35 * @return The obj argument is returned.
36 */
37 SkPDFObject* addObject(SkPDFObject* obj, bool onFirstPage);
39 /** Inform the catalog of the object's position in the final stream.
40 * The object should already have been added to the catalog. Returns
41 * the object's size.
42 * @param obj The object to add.
43 * @param offset The byte offset in the output stream of this object.
44 */
45 size_t setFileOffset(SkPDFObject* obj, off_t offset);
47 /** Output the object number for the passed object.
48 * @param obj The object of interest.
49 * @param stream The writable output stream to send the output to.
50 */
51 void emitObjectNumber(SkWStream* stream, SkPDFObject* obj);
53 /** Return the number of bytes that would be emitted for the passed
54 * object's object number.
55 * @param obj The object of interest
56 */
57 size_t getObjectNumberSize(SkPDFObject* obj);
59 /** Return the document flags in effect for this catalog/document.
60 */
61 SkPDFDocument::Flags getDocumentFlags() const { return fDocumentFlags; }
63 /** Output the cross reference table for objects in the catalog.
64 * Returns the total number of objects.
65 * @param stream The writable output stream to send the output to.
66 * @param firstPage If true, include first page objects only, otherwise
67 * include all objects not on the first page.
68 */
69 int32_t emitXrefTable(SkWStream* stream, bool firstPage);
71 /** Set substitute object for the passed object.
72 */
73 void setSubstitute(SkPDFObject* original, SkPDFObject* substitute);
75 /** Find and return any substitute object set for the passed object. If
76 * there is none, return the passed object.
77 */
78 SkPDFObject* getSubstituteObject(SkPDFObject* object);
80 /** Set file offsets for the resources of substitute objects.
81 * @param fileOffset Accumulated offset of current document.
82 * @param firstPage Indicate whether this is for the first page only.
83 * @return Total size of resources of substitute objects.
84 */
85 off_t setSubstituteResourcesOffsets(off_t fileOffset, bool firstPage);
87 /** Emit the resources of substitute objects.
88 */
89 void emitSubstituteResources(SkWStream* stream, bool firstPage);
91 private:
92 struct Rec {
93 Rec(SkPDFObject* object, bool onFirstPage)
94 : fObject(object),
95 fFileOffset(0),
96 fObjNumAssigned(false),
97 fOnFirstPage(onFirstPage) {
98 }
99 SkPDFObject* fObject;
100 off_t fFileOffset;
101 bool fObjNumAssigned;
102 bool fOnFirstPage;
103 };
105 struct SubstituteMapping {
106 SubstituteMapping(SkPDFObject* original, SkPDFObject* substitute)
107 : fOriginal(original), fSubstitute(substitute) {
108 }
109 SkPDFObject* fOriginal;
110 SkPDFObject* fSubstitute;
111 };
113 // TODO(vandebo): Make this a hash if it's a performance problem.
114 SkTDArray<struct Rec> fCatalog;
116 // TODO(arthurhsu): Make this a hash if it's a performance problem.
117 SkTDArray<SubstituteMapping> fSubstituteMap;
118 SkTSet<SkPDFObject*> fSubstituteResourcesFirstPage;
119 SkTSet<SkPDFObject*> fSubstituteResourcesRemaining;
121 // Number of objects on the first page.
122 uint32_t fFirstPageCount;
123 // Next object number to assign (on page > 1).
124 uint32_t fNextObjNum;
125 // Next object number to assign on the first page.
126 uint32_t fNextFirstPageObjNum;
128 SkPDFDocument::Flags fDocumentFlags;
130 int findObjectIndex(SkPDFObject* obj) const;
132 int assignObjNum(SkPDFObject* obj);
134 SkTSet<SkPDFObject*>* getSubstituteList(bool firstPage);
135 };
137 #endif
