Added message boxes and adjusted init() accordingly to display one on failure.
This commit is contained in:
Pietro Gagliardi
parent
0e41eddf54
commit
16e561c1e3
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@ -0,0 +1,98 @@
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// 7 february 2014
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package main
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import (
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"fmt"
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"syscall"
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"unsafe"
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)
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// MessageBox button types.
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const (
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_MB_ABORTRETRYIGNORE = 0x00000002
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_MB_CANCELTRYCONTINUE = 0x00000006
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_MB_HELP = 0x00004000
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_MB_OK = 0x00000000
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_MB_OKCANCEL = 0x00000001
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_MB_RETRYCANCEL = 0x00000005
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_MB_YESNO = 0x00000004
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_MB_YESNOCANCEL = 0x00000003
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)
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// MessageBox icon types.
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const (
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_MB_ICONEXCLAMATION = 0x00000030
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_MB_ICONWARNING = 0x00000030
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_MB_ICONINFORMATION = 0x00000040
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_MB_ICONASTERISK = 0x00000040
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_MB_ICONQUESTION = 0x00000020
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_MB_ICONSTOP = 0x00000010
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_MB_ICONERROR = 0x00000010
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_MB_ICONHAND = 0x00000010
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)
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// MessageBox default button types.
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const (
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_MB_DEFBUTTON1 = 0x00000000
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_MB_DEFBUTTON2 = 0x00000100
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_MB_DEFBUTTON3 = 0x00000200
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_MB_DEFBUTTON4 = 0x00000300
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)
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// MessageBox modality types.
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const (
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_MB_APPLMODAL = 0x00000000
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_MB_SYSTEMMODAL = 0x00001000
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_MB_TASKMODAL = 0x00002000
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)
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// MessageBox miscellaneous types.
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const (
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_MB_DEFAULT_DESKTOP_ONLY = 0x00020000
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_MB_RIGHT = 0x00080000
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_MB_RTLREADING = 0x00100000
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_MB_SETFOREGROUND = 0x00010000
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_MB_TOPMOST = 0x00040000
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_MB_SERVICE_NOTIFICATION = 0x00200000
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)
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// MessageBox return values.
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const (
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_IDABORT = 3
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_IDCANCEL = 2
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_IDCONTINUE = 11
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_IDIGNORE = 5
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_IDNO = 7
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_IDOK = 1
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_IDRETRY = 4
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_IDTRYAGAIN = 10
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_IDYES = 6
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)
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var (
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_messageBox = user32.NewProc("MessageBoxW")
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)
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func msgBox(lpText string, lpCaption string, uType uint32) (result int) {
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r1, _, err := _messageBox.Call(
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uintptr(_NULL),
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uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(lpText))),
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uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(lpCaption))),
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uintptr(uType))
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if r1 == 0 { // failure
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panic(fmt.Sprintf("error displaying message box to user: %v\nstyle: 0x%08X\ntitle: %q\ntext:\n%s", err, uType, lpCaption, lpText))
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}
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return int(r1)
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}
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// MsgBox displays an informational message box to the user with just an OK button.
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func MsgBox(title string, textfmt string, args ...interface{}) {
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// TODO add an icon?
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msgBox(fmt.Sprintf(textfmt, args...), title, _MB_OK)
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}
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// MsgBoxError displays a message box to the user with just an OK button and an icon indicating an error.
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func MsgBoxError(title string, textfmt string, args ...interface{}) {
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// TODO add an icon?
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msgBox(fmt.Sprintf(textfmt, args...), title, _MB_OK | _MB_ERROR)
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}
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14
init.go
14
init.go
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@ -2,16 +2,20 @@
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//package ui
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package main
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// TODO this will be system-defined
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func initpanic(err error) {
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panic("failure during init: " + err.Error())
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}
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import (
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"os"
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)
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func init() {
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initDone := make(chan error)
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go ui(initDone)
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err := <-initDone
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if err != nil {
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initpanic(err)
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// TODO provide copying instructions? will need to be system-specific
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MsgBoxError("UI Library Init Failure",
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"A failure occured during UI library initialization:\n%v\n" +
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"Please report this to the application developer or on http://github.com/andlabs/ui.",
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err)
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os.Exit(1)
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}
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}
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@ -1,85 +0,0 @@
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// 7 february 2014
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package main
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import (
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"syscall"
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"unsafe"
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)
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// MessageBox button types.
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const (
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MB_ABORTRETRYIGNORE = 0x00000002
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MB_CANCELTRYCONTINUE = 0x00000006
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MB_HELP = 0x00004000
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MB_OK = 0x00000000
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MB_OKCANCEL = 0x00000001
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MB_RETRYCANCEL = 0x00000005
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MB_YESNO = 0x00000004
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MB_YESNOCANCEL = 0x00000003
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)
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// MessageBox icon types.
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const (
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MB_ICONEXCLAMATION = 0x00000030
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MB_ICONWARNING = 0x00000030
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MB_ICONINFORMATION = 0x00000040
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MB_ICONASTERISK = 0x00000040
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MB_ICONQUESTION = 0x00000020
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MB_ICONSTOP = 0x00000010
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MB_ICONERROR = 0x00000010
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MB_ICONHAND = 0x00000010
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)
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// MessageBox default button types.
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const (
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MB_DEFBUTTON1 = 0x00000000
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MB_DEFBUTTON2 = 0x00000100
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MB_DEFBUTTON3 = 0x00000200
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MB_DEFBUTTON4 = 0x00000300
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)
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// MessageBox modality types.
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const (
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MB_APPLMODAL = 0x00000000
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MB_SYSTEMMODAL = 0x00001000
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MB_TASKMODAL = 0x00002000
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)
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// MessageBox miscellaneous types.
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const (
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MB_DEFAULT_DESKTOP_ONLY = 0x00020000
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MB_RIGHT = 0x00080000
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MB_RTLREADING = 0x00100000
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MB_SETFOREGROUND = 0x00010000
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MB_TOPMOST = 0x00040000
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MB_SERVICE_NOTIFICATION = 0x00200000
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)
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// MessageBox return values.
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const (
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IDABORT = 3
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IDCANCEL = 2
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IDCONTINUE = 11
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IDIGNORE = 5
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IDNO = 7
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IDOK = 1
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IDRETRY = 4
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IDTRYAGAIN = 10
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IDYES = 6
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)
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var (
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messageBox = user32.NewProc("MessageBoxW")
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)
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func MessageBox(hWnd HWND, lpText string, lpCaption string, uType uint32) (result int, err error) {
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r1, _, err := messageBox.Call(
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uintptr(unsafe.Pointer(hWnd)),
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uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(lpText))),
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uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(lpCaption))),
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uintptr(uType))
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if r1 == 0 { // failure
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return 0, err
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}
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return int(r1), nil
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}
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