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Paste on the canvas causes unhandled exception
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Offline Davide Carpi  
#1 Posted : 12 February 2014 20:25:25(UTC)
Davide Carpi


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This happens when the clipboard contains strings with spaces (Win7 x64 / SMath Studio 0.97)

P.S. this not happens using the nightly build 0.96.4909

Quote:
Le informazioni su come richiamare il debug JIT (Just-In-Time) anziché questa finestra
sono riportate in fondo al messaggio.

************** Testo dell'eccezione **************
System.NullReferenceException: object reference not set to an instance of an object.
in SMath.Control.Worksheet.(String )
in SMath.Control.Worksheet.Insert(String value)
in SMath.Control.WorksheetControl.OnKeyDown(KeyEventArgs e)
in System.Windows.Forms.Control.ProcessKeyEventArgs(Message& m)
in System.Windows.Forms.Control.WmKeyChar(Message& m)
in System.Windows.Forms.Control.WndProc(Message& m)
in System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
in System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


best regards,

Davide

Edited by user 12 February 2014 23:04:23(UTC)  | Reason: Not specified

Davide Carpi attached the following image(s):
SMath Studio Forum - Mozilla Firefox.png
ex.png
0.96.png
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Offline Davide Carpi  
#2 Posted : 12 February 2014 23:05:45(UTC)
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update: I notice the same issue even when I copy and paste a string with spaces from a text area to the canvas (so probably the HTML data is not the cause)
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Offline Andrey Ivashov  
#3 Posted : 13 February 2014 00:10:56(UTC)
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Cannot reproduce on latest 0.97 (tried the same text you shown on screenshot and some others).
May it be caused by some plug-in installed? If you will find it out I hope to find a way to prevent such kind of problems in future.

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Offline mkraska  
#4 Posted : 13 February 2014 00:32:08(UTC)
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I can confirm that strange things happen:

1. Open installed 0.97 with nearly all plugins enabled.
2. paste "ddd " to the canvas - a hyperlink region with that string appears
3. Switch off Hyperlink Region in the extension manager
4. paste "ddd " again - a snapshot region appears
5. Disable snapshot region as well
6. Again pasting "ddd " - a crash happens with the following details:



I can repeat that.

What I cannot repeat: sometimes pasting creates a conditionally formatted label, but I did not yet recognize the pattern how to invoke that.
Martin Kraska

Pre-configured portable distribution of SMath Studio: https://smath.com/wiki/SMath_with_Plugins.ashx
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Offline Davide Carpi  
#5 Posted : 13 February 2014 01:05:16(UTC)
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Thank you Martin and Andrey,

I've removed all the plugins and I can reproduce what Martin said...

The crash is caused by a third plugin, DevelopmentTools Huh .... the behavior of the Hyperlink and Snapshot regions is incredible... I'll investigate a little bit more Shok

Edited by user 13 February 2014 01:07:16(UTC)  | Reason: Not specified

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Offline Davide Carpi  
#6 Posted : 13 February 2014 01:25:13(UTC)
Davide Carpi


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OK my diagnosis:

- DevelopmentTools:
This code cause the crash (here the plugin doesn't override the Paste(IClipboardManager clipboard) function)
Code:

public string[] SupportedClipboardFormats
{
	get { return new string[] { DataFormats.UnicodeText }; }
}


This solve the problem (at least for the users):
Code:
public string[] SupportedClipboardFormats
{
	get { return new string[0]; }
}


Hyperlink & Snapshot Regions:
- SMath triggers the public override bool Paste(IClipboardManager clipboard) of any available plugin, even if there aren't regions on the canvas (but this should happens only if a region exists and is focused)

Edited by user 13 February 2014 01:26:46(UTC)  | Reason: Not specified

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Offline Andrey Ivashov  
#7 Posted : 13 February 2014 01:39:15(UTC)
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Thank you! I will implement fix asap.
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Offline Davide Carpi  
#8 Posted : 13 February 2014 03:18:35(UTC)
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Thank you very much Andrey OK

Originally Posted by: mkraska Go to Quoted Post
What I cannot repeat: sometimes pasting creates a conditionally formatted label, but I did not yet recognize the pattern how to invoke that.

I don't have noticed the bug in the front-end, but I've fixed the code as for the Development tools and I've pushed in the EM an update Secret

If you like my plugins consider to support SMath Studio buying a plan; to offer me a coffee: paypal.me/dcprojects
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