75 lines
2 KiB
Go
75 lines
2 KiB
Go
package buffer
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import (
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"encoding/gob"
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"errors"
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"io"
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"os"
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"time"
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"golang.org/x/text/encoding"
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"github.com/zyedidia/micro/internal/config"
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"github.com/zyedidia/micro/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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name := config.ConfigDir + "/buffers/" + util.EscapePath(b.AbsPath)
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return overwriteFile(name, encoding.Nop, func(file io.Writer) error {
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err := gob.NewEncoder(file).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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return err
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})
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}
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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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file, err := os.Open(config.ConfigDir + "/buffers/" + util.EscapePath(b.AbsPath))
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defer file.Close()
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if err == nil {
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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 store the information for the 'saveundo' and 'savecursor' options) if this problem persists.")
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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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