feat(渲染压缩): 完善字体三维动作导航及压缩

ofdgo_pdf_annot_trigger.go

@@ -0,0 +1,75 @@
+// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ofdgo
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/xiaoqidun/pdfgo"
+)
+
+// annotationTriggerActions 将释放点击和页面打开事件转换为OFD，不改变其他事件的触发条件
+// 入参: ctx 取消上下文, annotation PDF注解
+// 返回: []Action 点击动作, []Action 页面打开动作, error 事件、动作或取消错误
+func (p *pdfImporter) annotationTriggerActions(ctx context.Context, annotation pdfgo.Annotation) ([]Action, []Action, error) {
+	if annotation.Subtype == "Widget" {
+		return nil, nil, nil
+	}
+	triggers, err := p.reader.ReadAnnotationTriggers(ctx, annotation)
+	if err != nil {
+		return nil, nil, err
+	}
+	if len(triggers) == 0 {
+		return nil, nil, nil
+	}
+	flags, err := p.reader.ReadAnnotationFlags(annotation)
+	if err != nil {
+		return nil, nil, err
+	}
+	var clicks, opened []Action
+	for _, trigger := range triggers {
+		if flags&64 != 0 && (trigger.Event == "E" || trigger.Event == "X" || trigger.Event == "D" || trigger.Event == "U") {
+			continue
+		}
+		event := ""
+		switch trigger.Event {
+		case "U":
+			event = "CLICK"
+		case "PO":
+			event = "PO"
+		default:
+			return nil, nil, &pdfgo.UnsupportedError{Feature: "annotation trigger " + string(trigger.Event)}
+		}
+		currentPage := p.page
+		if event == "PO" {
+			currentPage = p.pageActionPage
+		}
+		actions, err := p.eventActions(ctx, trigger.Action, event, &currentPage)
+		if err != nil {
+			return nil, nil, err
+		}
+		if event == "CLICK" {
+			clicks = append(clicks, actions...)
+		} else {
+			p.pageActionPage = currentPage
+			opened = append(opened, actions...)
+		}
+	}
+	if len(opened) != 0 && (p.page < 0 || p.page >= len(p.editor.pages)) {
+		return nil, nil, fmt.Errorf("invalid annotation trigger page")
+	}
+	return clicks, opened, ctx.Err()
+}