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gen_eventtab.go
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/
gen_eventtab.go
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package main
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
)
func genEventTab(ctx *CommandContext) {
eventTabFile := ctx.EventTabDir
if eventTabFile == "" {
eventTabFile = strings.TrimSuffix(ctx.DeclFile, ".go") + "_tab_code.go"
} else {
eventTabFile = strings.Join([]string{filepath.Dir(ctx.DeclFile), ctx.EventTabDir, filepath.Base(strings.TrimSuffix(ctx.DeclFile, ".go")) + "_tab_code.go"}, string(filepath.Separator))
}
code := &bytes.Buffer{}
// 生成注释
{
program := strings.TrimSuffix(filepath.Base(os.Args[0]), filepath.Ext(os.Args[0]))
args := strings.Join(os.Args[1:], " ")
fmt.Fprintf(code, `// Code generated by %s %s; DO NOT EDIT.
package %s
`, program, args, ctx.EventTabPackage)
}
// 生成import
{
importCode := &bytes.Buffer{}
fmt.Fprintf(importCode, "\nimport (")
fmt.Fprintf(importCode, `
%s "%s"`, ctx.PackageEventAlias, packageEventPath)
fmt.Fprintf(importCode, `
container "git.golaxy.org/core/util/container"`)
fmt.Fprintf(importCode, "\n)\n")
fmt.Fprintf(code, importCode.String())
}
// 解析事件定义
eventDeclTab := EventDeclTab{}
eventDeclTab.Parse(ctx)
// event包前缀
eventPrefix := ""
if ctx.PackageEventAlias != "." {
eventPrefix = ctx.PackageEventAlias + "."
}
// 生成事件表接口
{
var eventsCode string
for _, event := range eventDeclTab {
eventsCode += fmt.Sprintf("\t%s() %sIEvent\n", event.Name, eventPrefix)
}
fmt.Fprintf(code, `
type I%[1]s interface {
%[2]s}
`, ctx.EventTabName, eventsCode)
}
// 生成事件表
{
var eventsRecursionCode string
for i, event := range eventDeclTab {
var eventRecursion string
if strings.Contains(event.Comment, "[EventRecursion_Allow]") {
eventRecursion = eventPrefix + "EventRecursion_Allow"
} else if strings.Contains(event.Comment, "[EventRecursion_Discard]") {
eventRecursion = eventPrefix + "EventRecursion_Discard"
} else if strings.Contains(event.Comment, "[EventRecursion_Deepest]") {
eventRecursion = eventPrefix + "EventRecursion_Deepest"
} else if strings.Contains(event.Comment, "[EventRecursion_Disallow]") {
eventRecursion = eventPrefix + "EventRecursion_Disallow"
} else if strings.Contains(event.Comment, "[EventRecursion_NotEmit]") {
eventRecursion = eventPrefix + "EventRecursion_NotEmit"
} else {
eventRecursion = "recursion"
}
eventsRecursionCode += fmt.Sprintf("\t(*eventTab)[%d].Init(autoRecover, reportError, %s, hookAllocator, gcCollector)\n", i, eventRecursion)
}
var eventsAccessCode string
for i, event := range eventDeclTab {
eventsAccessCode += fmt.Sprintf(`
const %[2]sId int = %[4]d
func (eventTab *%[1]s) %[2]s() %[3]sIEvent {
return &(*eventTab)[%[2]sId]
}
`, ctx.EventTabName, event.Name, eventPrefix, i)
}
fmt.Fprintf(code, `
type %[1]s [%[2]d]%[4]sEvent
func (eventTab *%[1]s) Init(autoRecover bool, reportError chan error, recursion %[4]sEventRecursion, hookAllocator container.Allocator[%[4]sHook], gcCollector container.GCCollector) {
%[3]s}
func (eventTab *%[1]s) Get(id int) %[4]sIEvent {
return &(*eventTab)[id]
}
func (eventTab *%[1]s) Open() {
for i := range *eventTab {
(*eventTab)[i].Open()
}
}
func (eventTab *%[1]s) Close() {
for i := range *eventTab {
(*eventTab)[i].Close()
}
}
func (eventTab *%[1]s) Clean() {
for i := range *eventTab {
(*eventTab)[i].Clean()
}
}
%[5]s
`, ctx.EventTabName, len(eventDeclTab), eventsRecursionCode, eventPrefix, eventsAccessCode)
}
fmt.Printf("EventTab: %s\n", ctx.EventTabName)
os.MkdirAll(filepath.Dir(eventTabFile), os.ModePerm)
if err := ioutil.WriteFile(eventTabFile, code.Bytes(), os.ModePerm); err != nil {
panic(err)
}
}