blob: f0889704a8407e02af7a6974dc4ca36594d92490 [file] [log] [blame]
* Copyright 2018 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef SkPDFTag_DEFINED
#define SkPDFTag_DEFINED
#include "include/docs/SkPDFDocument.h"
#include "include/private/SkTArray.h"
#include "include/private/SkTHash.h"
#include "src/core/SkArenaAlloc.h"
class SkPDFDocument;
struct SkPDFIndirectReference;
struct SkPDFTagNode;
class SkPDFTagTree {
void init(SkPDF::StructureElementNode*);
// Used to allow marked content to refer to its corresponding structure
// tree node, via a page entry in the parent tree. Returns -1 if no
// mark ID.
int createMarkIdForNodeId(int nodeId, unsigned pageIndex);
// Used to allow annotations to refer to their corresponding structure
// tree node, via the struct parent tree. Returns -1 if no struct parent
// key.
int createStructParentKeyForNodeId(int nodeId, unsigned pageIndex);
void addNodeAnnotation(int nodeId, SkPDFIndirectReference annotationRef, unsigned pageIndex);
SkPDFIndirectReference makeStructTreeRoot(SkPDFDocument* doc);
// An entry in a map from a node ID to an indirect reference to its
// corresponding structure element node.
struct IDTreeEntry {
int nodeId;
SkPDFIndirectReference ref;
static void Copy(SkPDF::StructureElementNode& node,
SkPDFTagNode* dst,
SkArenaAlloc* arena,
SkTHashMap<int, SkPDFTagNode*>* nodeMap);
SkPDFIndirectReference PrepareTagTreeToEmit(SkPDFIndirectReference parent,
SkPDFTagNode* node,
SkPDFDocument* doc);
SkArenaAlloc fArena;
SkTHashMap<int, SkPDFTagNode*> fNodeMap;
SkPDFTagNode* fRoot = nullptr;
SkTArray<SkTArray<SkPDFTagNode*>> fMarksPerPage;
std::vector<IDTreeEntry> fIdTreeEntries;
std::vector<int> fParentTreeAnnotationNodeIds;
SkPDFTagTree(const SkPDFTagTree&) = delete;
SkPDFTagTree& operator=(const SkPDFTagTree&) = delete;