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Since full escaped backup paths can become longer than the maximum filename size and hashed filenames cannot be restored it is helpful to have a lookup file for the user to resolve the hashed path.
90 lines
2.4 KiB
Go
90 lines
2.4 KiB
Go
package buffer
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import (
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"bytes"
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"encoding/gob"
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"errors"
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"os"
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"path/filepath"
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"time"
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"github.com/zyedidia/micro/v2/internal/config"
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"github.com/zyedidia/micro/v2/internal/util"
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)
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// The SerializedBuffer holds the types that get serialized when a buffer is saved
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// These are used for the savecursor and saveundo options
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type SerializedBuffer struct {
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EventHandler *EventHandler
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Cursor Loc
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ModTime time.Time
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}
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// Serialize serializes the buffer to config.ConfigDir/buffers
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func (b *Buffer) Serialize() error {
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if !b.Settings["savecursor"].(bool) && !b.Settings["saveundo"].(bool) {
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return nil
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}
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if b.Path == "" {
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return nil
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}
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var buf bytes.Buffer
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err := gob.NewEncoder(&buf).Encode(SerializedBuffer{
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b.EventHandler,
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b.GetActiveCursor().Loc,
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b.ModTime,
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})
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if err != nil {
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return err
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}
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name, resolveName := util.DetermineEscapePath(filepath.Join(config.ConfigDir, "buffers"), b.AbsPath)
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err = util.SafeWrite(name, buf.Bytes(), true)
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if err != nil {
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return err
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}
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if resolveName != "" {
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err = util.SafeWrite(resolveName, []byte(b.AbsPath), true)
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if err != nil {
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return err
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}
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}
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return nil
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}
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// Unserialize loads the buffer info from config.ConfigDir/buffers
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func (b *Buffer) Unserialize() error {
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// If either savecursor or saveundo is turned on, we need to load the serialized information
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// from ~/.config/micro/buffers
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if b.Path == "" {
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return nil
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}
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name, _ := util.DetermineEscapePath(filepath.Join(config.ConfigDir, "buffers"), b.AbsPath)
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file, err := os.Open(name)
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if err == nil {
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defer file.Close()
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var buffer SerializedBuffer
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decoder := gob.NewDecoder(file)
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err = decoder.Decode(&buffer)
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if err != nil {
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return errors.New(err.Error() + "\nYou may want to remove the files in ~/.config/micro/buffers (these files\nstore the information for the 'saveundo' and 'savecursor' options) if\nthis problem persists.\nThis may be caused by upgrading to version 2.0, and removing the 'buffers'\ndirectory will reset the cursor and undo history and solve the problem.")
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}
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if b.Settings["savecursor"].(bool) {
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b.StartCursor = buffer.Cursor
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}
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if b.Settings["saveundo"].(bool) {
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// We should only use last time's eventhandler if the file wasn't modified by someone else in the meantime
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if b.ModTime == buffer.ModTime {
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b.EventHandler = buffer.EventHandler
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b.EventHandler.cursors = b.cursors
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b.EventHandler.buf = b.SharedBuffer
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}
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}
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}
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return nil
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}
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