Determination of the first VISIBLE line of the Scintilla element of the SciTe editor by means of the Autoit

[guti]

Whether it is possible to define, in principle, lines of "visible" part

of the text in an element "[CLASS:SciTEWindow]", "", "[CLASS:Scintilla; INSTANCE:1]" ?

(Line 37 on the image. How to determinate it?)

If yes, how to set 'topindex' of the element "Scintilla"' with use of Autoit.?

I didn't find anything better, than API Scintilla functions. But how to use them by means of the Autoit?

Excuse for my bad English.

[mikell]

Strangely this works for me

#include <GuiRichEdit.au3>
$c = ControlGetHandle("[CLASS:SciTEWindow]", "", "[CLASS:Scintilla; INSTANCE:1]")
Msgbox(0,"", _GUICtrlRichEdit_GetNumberOfFirstVisibleLine ( $c))

but with no time enough to test further more...

[guti]

Many thanks, mikell. It works.

_GUICtrlRichEdit_GetNumberOfFirstVisibleLine()

But it is necessary before it to expand all follds, which are before the first visible line . ("Toggle all folds" in the View menu)

If before the visible line folds were collapsed, the result is not correct.

  

   

How to calculate the number of lines in the collapsed folds, which are before the first visible line? Naturally using Autoit. I think, it is the following theme for a forum.

Thanks, for spent you time.

[mikell]

Well with a little more time I found this : you don't need to expand folders but go back to the Scintilla Api features and dig inside
And this one was not so easy to find  

$Sci = ControlGetHandle("[CLASS:SciTEWindow]", "", "[CLASS:Scintilla; INSTANCE:1]")

Global Const $SCI_GETFIRSTVISIBLELINE = 2152
Global Const $SCI_DOCLINEFROMVISIBLE = 2221

$display_visible_line1 =  _Scite_SendMessage($Sci, $SCI_GETFIRSTVISIBLELINE, 0, 0) + 1
$document_visible_line1 = _Scite_SendMessage($Sci, $SCI_DOCLINEFROMVISIBLE, $display_visible_line1, 0)
Msgbox(0,"", $document_visible_line1)


Func _Scite_SendMessage($hwnd, $msg, $wparam, $lparam)
    Local $ret
    $ret = DllCall("user32.dll", "long", "SendMessageA", "long", $hwnd, "int", $msg, "int", $wparam, "int", $lparam)
    If @error Then return SetError(1, 0, 0)
    Return $ret[0]
EndFunc   ;==>_Scite_SendMessage

 

Edited April 20, 2017 by mikell

[guti]

Many thanks, mikell.

Your example led me to "Scintilla.h".
This huge field for researches.
Unfortunately there are no comments for many constants there.
So far I will try to understand in what a difference by a call of your function

$msg = $SCI_GETFIRSTVISIBLELINE ; (= 2152)

$display_visible_line1 = _Scite_SendMessage($Sci, $SCI_GETFIRSTVISIBLELINE, 0, 0) + 1

Func _Scite_SendMessage($hwnd, $msg, $wparam, $lparam)
    $ret = DllCall("user32.dll", "long", "SendMessageA", "long", $hwnd, "int", $msg, "int", $wparam, "int", $lparam)
EndFunc

and such function:

$msg = $EM_GETFIRSTVISIBLELINE ; (= 0xCE)    (from file "EditConstants.au3)

$s = _mySendMessage($Sci, $EM_GETFIRSTVISIBLELINE) + 1

Func _mySendMessage($hwnd, $iMsg, $wparam, $lparam)
    Local $aResult = DllCall("user32.dll", "lresult", "SendMessageW", "hwnd", $hwnd, "uint", $iMsg, "wparam", $wparam, "lparam", $lparam)
EndFunc   ;==>_mySendMessage

Perhaps:  Digital - Hex, "long" - "lresult".

Once again thanks that found time

Edited April 21, 2017 by guti

[mikell]

As you could notice the Scintilla control formerly was a richedit control, reason why some Edit and RichEdit funcs still work
But the clean way is to use the proper API and the Scintilla.h constants - btw it's very easy to make an Autoit include from it
About the DllCall syntax yours is the good one, I was in a hurry 
SendMessageA = force ANSI while W = unicode

Happy search 

[guti]

The question is closed. Thanks for the help.