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window.go
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window.go
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// Copyright 2013 The lime Authors.
// Use of this source code is governed by a 2-clause
// BSD-style license that can be found in the LICENSE file.
package backend
import (
"fmt"
"io/ioutil"
"path/filepath"
"runtime/debug"
"sync"
"github.com/limetext/backend/log"
"github.com/limetext/text"
)
type Window struct {
text.HasId
text.HasSettings
views []*View
active_view *View
lock sync.Mutex
}
// implement the fmt.Stringer interface
func (w *Window) String() string {
return fmt.Sprintf("Window{id:%d}", w.Id())
}
func (w *Window) NewFile() *View {
w.lock.Lock()
defer w.lock.Unlock()
w.views = append(w.views, newView(w))
v := w.views[len(w.views)-1]
v.setBuffer(text.NewBuffer())
v.selection.Clear()
v.selection.Add(text.Region{A: 0, B: 0})
v.Settings().Set("lime.last_save_change_count", v.ChangeCount())
w.SetActiveView(v)
OnNew.Call(v)
return v
}
func (w *Window) Views() []*View {
w.lock.Lock()
defer w.lock.Unlock()
ret := make([]*View, len(w.views))
copy(ret, w.views)
return ret
}
func (w *Window) remove(v *View) {
w.lock.Lock()
defer w.lock.Unlock()
for i, vv := range w.views {
if v == vv {
end := len(w.views) - 1
if i != end {
copy(w.views[i:], w.views[i+1:])
}
w.views = w.views[:end]
return
}
}
log.Error("Wanted to remove view %s, but it doesn't appear to be a child of this window", v)
}
func (w *Window) OpenFile(filename string, flags int) *View {
v := w.NewFile()
v.SetScratch(true)
e := v.BeginEdit()
if fn, err := filepath.Abs(filename); err != nil {
v.SetFileName(filename)
} else {
v.SetFileName(fn)
}
if d, err := ioutil.ReadFile(filename); err != nil {
log.Error("Couldn't load file %s: %s", filename, err)
} else {
v.Insert(e, 0, string(d))
}
v.EndEdit(e)
v.selection.Clear()
v.selection.Add(text.Region{A: 0, B: 0})
v.Settings().Set("lime.last_save_change_count", v.ChangeCount())
v.SetScratch(false)
OnLoad.Call(v)
return v
}
func (w *Window) SetActiveView(v *View) {
if w.active_view != nil {
OnDeactivated.Call(w.active_view)
}
w.active_view = v
if w.active_view != nil {
OnActivated.Call(w.active_view)
}
}
func (w *Window) ActiveView() *View {
return w.active_view
}
// Closes the Window and all its Views.
// Returns "true" if the Window closed successfully. Otherwise returns "false".
func (w *Window) Close() bool {
if !w.CloseAllViews() {
return false
}
GetEditor().remove(w)
return true
}
// Closes all of the Window's Views.
// Returns "true" if all the Views closed successfully. Otherwise returns "false".
func (w *Window) CloseAllViews() bool {
for len(w.views) > 0 {
if !w.views[0].Close() {
return false
}
}
return true
}
func (w *Window) runCommand(c WindowCommand, name string) error {
defer func() {
if r := recover(); r != nil {
log.Error("Paniced while running window command %s %v: %v\n%s", name, c, r, string(debug.Stack()))
}
}()
return c.Run(w)
}