143 lines
3.2 KiB
Go
143 lines
3.2 KiB
Go
package main
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import (
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"fmt"
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"os"
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"path/filepath"
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"unsafe"
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"yvbolt/debconf"
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"github.com/ying32/govcl/vcl"
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)
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type debconfLoadedDatabase struct {
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displayName string
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db *debconf.Database
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nav *vcl.TTreeNode
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arena []*navData // keepalive
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}
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func (ld *debconfLoadedDatabase) DisplayName() string {
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return ld.displayName
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}
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func (ld *debconfLoadedDatabase) DriverName() string {
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return "debconf"
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}
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func (ld *debconfLoadedDatabase) RootElement() *vcl.TTreeNode {
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return ld.nav
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}
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func (ld *debconfLoadedDatabase) Keepalive(ndata *navData) {
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ld.arena = append(ld.arena, ndata)
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}
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func (ld *debconfLoadedDatabase) RenderForNav(f *TMainForm, ndata *navData) {
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// Load properties
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content := fmt.Sprintf("Entries: %d\nUnique attributes: %d\n", len(ld.db.Entries), len(ld.db.AllColumnNames))
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f.propertiesBox.SetText(content)
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// Load data
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f.contentBox.SetEnabled(false)
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f.contentBox.Clear()
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// debconf always uses Key + Value as the columns
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indexes := make(map[string]int)
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f.contentBox.Columns().Clear()
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for i, cname := range ld.db.AllColumnNames {
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indexes[cname] = i
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col := f.contentBox.Columns().Add()
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col.SetCaption(cname)
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col.SetWidth(MY_WIDTH)
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}
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for _, entry := range ld.db.Entries {
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cell := f.contentBox.Items().Add()
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cell.SetCaption(entry.Name)
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texts := make([]string, len(ld.db.AllColumnNames))
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for _, proppair := range entry.Properties {
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texts[indexes[proppair[0]]-1 /* compensate for 'Name' always being first */] = proppair[1]
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}
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cell.SubItems().AddStrings2(texts)
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}
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// Valid
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f.contentBox.SetEnabled(true)
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}
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func (ld *debconfLoadedDatabase) NavChildren(ndata *navData) ([]string, error) {
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// In the debconf implementation, there is only one child: "Data"
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if len(ndata.bucketPath) == 0 {
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return []string{"Data"}, nil
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} else {
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// No children deeper than that
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return []string{}, nil
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}
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}
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func (ld *debconfLoadedDatabase) NavContext(ndata *navData) ([]contextAction, error) {
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return nil, nil // No special actions are supported
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}
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func (ld *debconfLoadedDatabase) ExecQuery(query string, resultArea *vcl.TListView) {
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vcl.ShowMessage("debconf doesn't support querying")
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}
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func (ld *debconfLoadedDatabase) Close() {
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ld.arena = nil
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}
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var _ loadedDatabase = &debconfLoadedDatabase{} // interface assertion
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//
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func (f *TMainForm) debconfAddDatabaseFrom(path string) {
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// TODO load in background thread to stop blocking the UI
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fh, err := os.OpenFile(path, os.O_RDONLY, 0400)
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if err != nil {
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vcl.ShowMessage(fmt.Sprintf("Failed to load database: %s", err.Error()))
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return
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}
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defer fh.Close()
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db, err := debconf.Parse(fh)
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if err != nil {
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vcl.ShowMessage(fmt.Sprintf("Failed to load database: %s", err.Error()))
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return
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}
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ld := &debconfLoadedDatabase{
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db: db,
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displayName: filepath.Base(path),
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}
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ld.nav = f.Buckets.Items().Add(nil, ld.displayName)
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ld.nav.SetHasChildren(true) // dynamically populate in OnNavExpanding
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ld.nav.SetImageIndex(imgDatabase)
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ld.nav.SetSelectedIndex(imgDatabase)
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navData := &navData{
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ld: ld,
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childrenLoaded: false, // will be loaded dynamically
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bucketPath: []string{}, // empty = root
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}
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ld.nav.SetData(unsafe.Pointer(navData))
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f.dbs = append(f.dbs, ld)
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f.Buckets.SetSelected(ld.nav) // Select new element
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ld.Keepalive(navData)
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}
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