mirror of
https://github.com/xiaoqidun/ofdgo.git
synced 2026-10-29 17:27:08 +08:00
111 lines
3.9 KiB
Go
111 lines
3.9 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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"encoding/xml"
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"strings"
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)
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// compressionFontUsage 按文档合并共享字体用字，版本编辑仅统计选中入口
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// 入参: ctx 取消上下文, documents 文档入口, resources 资源索引, references 各文件引用, read 输出文件读取方法
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// 返回: map[string]*editorFontUsage 各字体文件的用字，无法确定作用域时为空, error 读取或取消错误
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func (r *Reader) compressionFontUsage(ctx context.Context, documents map[string]bool, resources []string, references map[string]*editorResourceRefs, read func(string) ([]byte, error)) (map[string]*editorFontUsage, error) {
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selected := ""
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if r.OFD.DocBody[r.documentIndex].versioned {
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var err error
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selected, err = r.DocumentRootContext(ctx)
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if err != nil {
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return nil, err
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}
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}
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scoped, err := resourceReferenceScopes(ctx, documents, resources, references, selected)
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if err != nil || scoped == nil {
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return nil, err
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}
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return resourceFontUsage(ctx, resources, scoped, read)
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}
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// resourceFontUsage 按已确认的文档作用域合并各字体文件的字符和字形引用
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// 入参: ctx 取消上下文, resources 资源索引, scoped 各索引的用字范围, read 输出文件读取方法
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// 返回: map[string]*editorFontUsage 各字体文件的用字, error 读取或取消错误
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func resourceFontUsage(ctx context.Context, resources []string, scoped map[string]*editorResourceRefs, read func(string) ([]byte, error)) (map[string]*editorFontUsage, error) {
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result := make(map[string]*editorFontUsage)
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protected := make(map[string]bool)
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for _, name := range resources {
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if err := ctx.Err(); err != nil {
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return nil, err
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}
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refs := scoped[name]
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if refs == nil {
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continue
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}
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data, err := read(name)
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if err != nil {
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return nil, err
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}
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root, err := parseEditorXMLContext(ctx, data)
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if err != nil {
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return nil, err
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}
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for font := range editorResourceNodes(root, "Fonts", "Font") {
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if err := ctx.Err(); err != nil {
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return nil, err
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}
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file := font.child("FontFile")
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if file == nil {
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continue
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}
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var value string
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if err := xml.Unmarshal(data[file.start:file.end], &value); err != nil {
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return nil, err
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}
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location := editorResourceLocation(name, root.attr("BaseLoc"), value)
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alternate := cleanPackagePath(resolveResourcePath(name, root.attr("BaseLoc"), value))
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id, charset := editorResourceID(font.attr("ID")), font.attr("Charset")
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unsafe := id == "" || charset != "" && !strings.EqualFold(charset, "unicode") || location != alternate
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for i, path := range [2]string{location, alternate} {
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if i == 1 && path == location {
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continue
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}
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if result[path] == nil {
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result[path] = newEditorFontUsage()
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}
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result[path].merge(refs.fonts[id], unsafe)
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}
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}
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for media := range editorResourceNodes(root, "MultiMedias", "MultiMedia") {
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file := media.child("MediaFile")
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if file == nil {
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continue
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}
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var value string
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if err := xml.Unmarshal(data[file.start:file.end], &value); err != nil {
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return nil, err
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}
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for _, location := range []string{editorResourceLocation(name, root.attr("BaseLoc"), value), cleanPackagePath(resolveResourcePath(name, root.attr("BaseLoc"), value))} {
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protected[location] = true
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}
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}
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}
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for location := range protected {
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if usage := result[location]; usage != nil {
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usage.unsafe = true
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}
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}
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return result, ctx.Err()
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}
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