first
This commit is contained in:
508
main.go
Normal file
508
main.go
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@@ -0,0 +1,508 @@
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package main
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import (
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"encoding/json"
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"fmt"
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"os"
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"path/filepath"
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"sort"
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"strings"
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"time"
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"fyne.io/fyne/v2"
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"fyne.io/fyne/v2/app"
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"fyne.io/fyne/v2/canvas"
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"fyne.io/fyne/v2/container"
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"fyne.io/fyne/v2/dialog"
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"fyne.io/fyne/v2/layout"
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"fyne.io/fyne/v2/theme"
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"fyne.io/fyne/v2/widget"
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)
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// Note 笔记数据结构
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type Note struct {
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ID string `json:"id"`
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Title string `json:"title"`
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Content string `json:"content"`
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Tags []string `json:"tags"`
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CreatedAt time.Time `json:"created_at"`
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UpdatedAt time.Time `json:"updated_at"`
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}
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// NoteStore 笔记存储管理
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type NoteStore struct {
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notes []Note
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path string
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app fyne.App
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window fyne.Window
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}
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func NewNoteStore(app fyne.App, window fyne.Window) *NoteStore {
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home, _ := os.UserHomeDir()
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path := filepath.Join(home, ".goknow", "notes.json")
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os.MkdirAll(filepath.Dir(path), 0755)
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store := &NoteStore{
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app: app,
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window: window,
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path: path,
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}
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store.Load()
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return store
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}
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func (s *NoteStore) Load() {
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data, err := os.ReadFile(s.path)
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if err != nil {
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s.notes = []Note{}
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return
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}
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json.Unmarshal(data, &s.notes)
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}
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func (s *NoteStore) Save() {
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data, _ := json.MarshalIndent(s.notes, "", " ")
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os.WriteFile(s.path, data, 0644)
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}
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func (s *NoteStore) Add(note Note) {
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s.notes = append(s.notes, note)
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s.Save()
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}
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func (s *NoteStore) Update(id string, title, content string, tags []string) {
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for i := range s.notes {
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if s.notes[i].ID == id {
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s.notes[i].Title = title
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s.notes[i].Content = content
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s.notes[i].Tags = tags
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s.notes[i].UpdatedAt = time.Now()
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s.Save()
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return
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}
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}
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}
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func (s *NoteStore) Delete(id string) {
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for i := range s.notes {
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if s.notes[i].ID == id {
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s.notes = append(s.notes[:i], s.notes[i+1:]...)
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s.Save()
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return
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}
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}
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}
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func (s *NoteStore) Search(query string) []Note {
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if query == "" {
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// 按更新时间排序
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sort.Slice(s.notes, func(i, j int) bool {
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return s.notes[i].UpdatedAt.After(s.notes[j].UpdatedAt)
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})
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return s.notes
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}
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var results []Note
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query = strings.ToLower(query)
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for _, note := range s.notes {
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if strings.Contains(strings.ToLower(note.Title), query) ||
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strings.Contains(strings.ToLower(note.Content), query) ||
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containsTag(note.Tags, query) {
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results = append(results, note)
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}
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}
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return results
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}
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func containsTag(tags []string, query string) bool {
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for _, tag := range tags {
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if strings.Contains(strings.ToLower(tag), query) {
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return true
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}
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}
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return false
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}
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// UI 组件
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type NoteApp struct {
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store *NoteStore
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window fyne.Window
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noteList *widget.List
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searchBox *widget.Entry
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titleEntry *widget.Entry
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content *widget.Entry
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tagsEntry *widget.Entry
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preview *widget.RichText
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currentID string
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notes []Note
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}
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func NewNoteApp(app fyne.App) *NoteApp {
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window := app.NewWindow("GoKnow - 知识管理")
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window.Resize(fyne.NewSize(1200, 800))
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window.CenterOnScreen()
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noteApp := &NoteApp{
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window: window,
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}
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noteApp.store = NewNoteStore(app, window)
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noteApp.setupUI()
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return noteApp
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}
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func (a *NoteApp) setupUI() {
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// 左侧边栏 - 搜索和列表
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a.searchBox = widget.NewEntry()
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a.searchBox.SetPlaceHolder("🔍 搜索笔记、标签...")
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a.searchBox.OnChanged = func(s string) {
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a.refreshList()
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}
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// 新建按钮
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newBtn := widget.NewButtonWithIcon("新建笔记", theme.ContentAddIcon(), func() {
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a.createNewNote()
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})
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newBtn.Importance = widget.HighImportance
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// 笔记列表
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a.noteList = widget.NewList(
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func() int { return len(a.notes) },
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func() fyne.CanvasObject {
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title := widget.NewLabel("Title")
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timeLabel := widget.NewLabel("Time")
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return container.NewBorder(
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nil, nil,
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widget.NewIcon(theme.DocumentIcon()),
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timeLabel,
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title,
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)
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},
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func(i widget.ListItemID, o fyne.CanvasObject) {
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note := a.notes[i]
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box := o.(*fyne.Container)
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// The structure from NewBorder with (top, bottom, left, right, center) is:
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// Objects[0]: center (title), Objects[1]: left (icon), Objects[2]: right (timeLabel)
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title := box.Objects[0].(*widget.Label)
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title.SetText(note.Title)
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if note.Title == "" {
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title.SetText("无标题")
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}
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timeLabel := box.Objects[2].(*widget.Label)
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timeLabel.SetText(formatTime(note.UpdatedAt))
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timeLabel.TextStyle = fyne.TextStyle{Italic: true}
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},
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)
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a.noteList.OnSelected = func(id widget.ListItemID) {
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if id < len(a.notes) {
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a.loadNote(a.notes[id])
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}
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}
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sidebar := container.NewBorder(
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container.NewVBox(a.searchBox, newBtn),
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nil, nil, nil,
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a.noteList,
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)
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// 右侧编辑器
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a.titleEntry = widget.NewEntry()
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a.titleEntry.SetPlaceHolder("笔记标题")
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a.titleEntry.TextStyle = fyne.TextStyle{Bold: true}
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a.tagsEntry = widget.NewEntry()
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a.tagsEntry.SetPlaceHolder("标签: 用逗号分隔, 如: go, 编程, 笔记")
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a.content = widget.NewMultiLineEntry()
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a.content.SetPlaceHolder("在此输入 Markdown 内容...\n\n支持:\n- 标题\n- **粗体**\n- *斜体*\n- `代码`\n- [链接](url)")
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a.content.Wrapping = fyne.TextWrapWord
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// 预览区域
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a.preview = widget.NewRichText()
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a.preview.Wrapping = fyne.TextWrapWord
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// 工具栏
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saveBtn := widget.NewButtonWithIcon("保存", theme.DocumentSaveIcon(), func() {
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a.saveCurrentNote()
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})
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saveBtn.Importance = widget.HighImportance
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deleteBtn := widget.NewButtonWithIcon("删除", theme.DeleteIcon(), func() {
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a.deleteCurrentNote()
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})
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toolbar := container.NewHBox(saveBtn, deleteBtn, layout.NewSpacer())
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// 编辑器容器
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editor := container.NewBorder(
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container.NewVBox(
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a.titleEntry,
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widget.NewSeparator(),
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a.tagsEntry,
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widget.NewSeparator(),
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toolbar,
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),
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nil, nil, nil,
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container.NewHSplit(
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a.content,
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container.NewScroll(a.preview),
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),
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)
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// 主布局
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split := container.NewHSplit(sidebar, editor)
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split.Offset = 0.3
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a.window.SetContent(split)
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// 实时预览
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a.content.OnChanged = func(s string) {
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a.updatePreview(s)
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}
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// 初始加载
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a.refreshList()
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if len(a.notes) > 0 {
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a.noteList.Select(0)
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} else {
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a.createNewNote()
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}
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}
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func (a *NoteApp) createNewNote() {
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note := Note{
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ID: fmt.Sprintf("%d", time.Now().UnixNano()),
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CreatedAt: time.Now(),
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UpdatedAt: time.Now(),
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}
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a.store.Add(note)
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a.refreshList()
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a.selectNoteByID(note.ID)
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a.titleEntry.SetText("")
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a.content.SetText("")
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a.tagsEntry.SetText("")
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a.currentID = note.ID
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a.updatePreview("")
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}
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func (a *NoteApp) loadNote(note Note) {
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a.currentID = note.ID
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a.titleEntry.SetText(note.Title)
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a.content.SetText(note.Content)
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a.tagsEntry.SetText(strings.Join(note.Tags, ", "))
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a.updatePreview(note.Content)
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}
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func (a *NoteApp) saveCurrentNote() {
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if a.currentID == "" {
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return
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}
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tags := []string{}
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for _, t := range strings.Split(a.tagsEntry.Text, ",") {
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t = strings.TrimSpace(t)
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if t != "" {
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tags = append(tags, t)
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}
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}
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a.store.Update(a.currentID, a.titleEntry.Text, a.content.Text, tags)
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a.refreshList()
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// 显示保存动画提示
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a.showToast("已保存")
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}
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func (a *NoteApp) deleteCurrentNote() {
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if a.currentID == "" {
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return
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}
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dialog.ShowConfirm("确认删除", "确定要删除这条笔记吗？", func(confirm bool) {
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if confirm {
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a.store.Delete(a.currentID)
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a.refreshList()
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if len(a.notes) > 0 {
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a.noteList.Select(0)
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} else {
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a.createNewNote()
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}
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}
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}, a.window)
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}
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func (a *NoteApp) refreshList() {
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a.notes = a.store.Search(a.searchBox.Text)
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a.noteList.Refresh()
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if len(a.notes) == 0 && a.searchBox.Text == "" {
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// 如果没有笔记且不是搜索状态，创建默认笔记
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a.createNewNote()
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}
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}
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func (a *NoteApp) selectNoteByID(id string) {
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for i, note := range a.notes {
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if note.ID == id {
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a.noteList.Select(i)
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return
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}
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}
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}
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func (a *NoteApp) updatePreview(markdown string) {
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// 简单的 Markdown 渲染
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segments := parseMarkdown(markdown)
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a.preview.Segments = segments
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a.preview.Refresh()
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}
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func (a *NoteApp) showToast(message string) {
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// 创建临时提示
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toast := canvas.NewText(message, theme.PrimaryColor())
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toast.TextSize = 16
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toast.TextStyle = fyne.TextStyle{Bold: true}
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// 添加到窗口右上角
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go func() {
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time.Sleep(2 * time.Second)
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}()
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}
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func formatTime(t time.Time) string {
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now := time.Now()
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diff := now.Sub(t)
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if diff < time.Hour {
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return fmt.Sprintf("%d分钟前", int(diff.Minutes()))
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} else if diff < 24*time.Hour {
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return fmt.Sprintf("%d小时前", int(diff.Hours()))
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} else if diff < 7*24*time.Hour {
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return fmt.Sprintf("%d天前", int(diff.Hours()/24))
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}
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return t.Format("01-02")
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}
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// 简单的 Markdown 解析器
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func parseMarkdown(text string) []widget.RichTextSegment {
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var segments []widget.RichTextSegment
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lines := strings.Split(text, "\n")
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for i, line := range lines {
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// 标题
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if strings.HasPrefix(line, "# ") {
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seg := &widget.TextSegment{
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Text: strings.TrimPrefix(line, "# "),
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Style: widget.RichTextStyleHeading,
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}
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seg.Style.TextStyle = fyne.TextStyle{Bold: true}
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seg.Style.SizeName = theme.SizeNameHeadingText
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segments = append(segments, seg)
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} else if strings.HasPrefix(line, "## ") {
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seg := &widget.TextSegment{
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Text: strings.TrimPrefix(line, "## "),
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Style: widget.RichTextStyleSubHeading,
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}
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seg.Style.TextStyle = fyne.TextStyle{Bold: true}
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segments = append(segments, seg)
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} else {
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// 处理行内格式
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parts := parseInlineFormat(line)
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segments = append(segments, parts...)
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}
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// 添加换行（除了最后一行）
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if i < len(lines)-1 {
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segments = append(segments, &widget.TextSegment{
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Text: "\n",
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Style: widget.RichTextStyleParagraph,
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})
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}
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}
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return segments
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}
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func parseInlineFormat(line string) []widget.RichTextSegment {
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var segments []widget.RichTextSegment
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remaining := line
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for len(remaining) > 0 {
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// 查找粗体 **text**
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if idx := strings.Index(remaining, "**"); idx != -1 {
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if idx > 0 {
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segments = append(segments, &widget.TextSegment{
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Text: remaining[:idx],
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Style: widget.RichTextStyleInline,
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})
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}
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end := strings.Index(remaining[idx+2:], "**")
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if end != -1 {
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segments = append(segments, &widget.TextSegment{
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Text: remaining[idx+2 : idx+2+end],
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Style: widget.RichTextStyleStrong,
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})
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remaining = remaining[idx+2+end+2:]
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continue
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}
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}
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// 查找斜体 *text*
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if idx := strings.Index(remaining, "*"); idx != -1 && !strings.HasPrefix(remaining, "**") {
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if idx > 0 {
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segments = append(segments, &widget.TextSegment{
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Text: remaining[:idx],
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Style: widget.RichTextStyleInline,
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})
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}
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end := strings.Index(remaining[idx+1:], "*")
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if end != -1 {
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segments = append(segments, &widget.TextSegment{
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Text: remaining[idx+1 : idx+1+end],
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Style: widget.RichTextStyleEmphasis,
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})
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remaining = remaining[idx+1+end+1:]
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continue
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}
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}
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// 查找代码 `text`
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if idx := strings.Index(remaining, "`"); idx != -1 {
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if idx > 0 {
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segments = append(segments, &widget.TextSegment{
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Text: remaining[:idx],
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Style: widget.RichTextStyleInline,
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})
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}
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end := strings.Index(remaining[idx+1:], "`")
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if end != -1 {
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seg := &widget.TextSegment{
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Text: remaining[idx+1 : idx+1+end],
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Style: widget.RichTextStyleCodeBlock,
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}
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seg.Style.ColorName = theme.ColorNamePrimary
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segments = append(segments, seg)
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remaining = remaining[idx+1+end+1:]
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continue
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}
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}
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// 普通文本
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segments = append(segments, &widget.TextSegment{
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Text: remaining,
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Style: widget.RichTextStyleInline,
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})
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break
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}
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return segments
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}
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func main() {
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myApp := app.NewWithID("cn.miw.goknow")
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myApp.Settings().SetTheme(theme.DarkTheme())
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noteApp := NewNoteApp(myApp)
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noteApp.window.ShowAndRun()
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}
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Reference in New Issue
Block a user