mirror of
https://github.com/xiaoqidun/ofdgo.git
synced 2026-10-29 14:16:55 +08:00
83 lines
2.9 KiB
Go
83 lines
2.9 KiB
Go
// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ofdgo
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import (
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"context"
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"maps"
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"github.com/xiaoqidun/pdfgo"
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)
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// pdfThreeDMarkupState 复用同页批注的宿主解析及模型校验，不保留模型解码缓冲
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type pdfThreeDMarkupState struct {
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sources map[pdfgo.Reference]pdfgo.ThreeD
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sums map[*pdfgo.Stream][16]byte
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}
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// threeDMarkupAnnotation 应用默认三维视图的批注可见性，其他视图批注保留为隐藏注解
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// 入参: ctx 取消上下文, annotation 批注, markup 关联, state 同页缓存, strict 严格检查开关
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// 返回: pdfgo.Annotation 静态批注, error 关联、校验或取消错误
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func (p *pdfImporter) threeDMarkupAnnotation(ctx context.Context, annotation pdfgo.Annotation, markup *pdfgo.ThreeDMarkup, state *pdfThreeDMarkupState, strict bool) (pdfgo.Annotation, error) {
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if markup == nil {
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return annotation, nil
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}
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if strict {
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return annotation, &pdfgo.UnsupportedError{Feature: "3D markup view switching conversion"}
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}
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source, ok := state.sources[markup.Annotation.Reference]
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if !ok || markup.Annotation.Reference == (pdfgo.Reference{}) {
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var err error
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source, err = p.reader.ReadThreeDContext(ctx, markup.Annotation)
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if err != nil {
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return annotation, err
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}
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if markup.Annotation.Reference != (pdfgo.Reference{}) {
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if state.sources == nil {
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state.sources = make(map[pdfgo.Reference]pdfgo.ThreeD)
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}
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state.sources[markup.Annotation.Reference] = source
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}
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}
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if markup.Checksum != nil {
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sum, ok := state.sums[source.Stream]
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if !ok {
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var err error
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sum, err = pdfgo.ThreeDArtworkChecksum(ctx, source.Stream)
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if err != nil {
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return annotation, err
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}
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if state.sums == nil {
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state.sums = make(map[*pdfgo.Stream][16]byte)
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}
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state.sums[source.Stream] = sum
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}
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if sum != *markup.Checksum {
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p.warning(pdfgo.Diagnostic{Page: p.page + 1, Message: "PDF 3D markup artwork checksum differs; view association may be stale"})
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}
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}
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visible := source.ActivationPolicy.Activation != "XA" && markup.MatchesView(source.SelectedView)
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if !visible {
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flags, err := p.reader.ReadAnnotationFlags(annotation)
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if err != nil {
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return annotation, err
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}
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annotation.Dictionary = maps.Clone(annotation.Dictionary)
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annotation.Dictionary["F"] = pdfgo.Integer(flags | 2)
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}
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p.warning(pdfgo.Diagnostic{Page: p.page + 1, Message: "PDF 3D markup default view visibility applied; view switching not transferred"})
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return annotation, ctx.Err()
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}
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