CefSharp.Wpf Can‘t support other Input Method

[willent]

cef version:33.0.1750 r1738 cefsharp version 33.0.2.0
CefSharp.Wpf it is unable to input any Chinese。

[jornh]

I don't know anything about IME. But I searched for it here in the CefSharp repo and results for CefSharp 1 came up: https://github.com/cefsharp/CefSharp/search?q=ime&type=Issues&utf8=%E2%9C%93

Does it do the right thing if you add an OnPreviewTextInput() handler like this:

        protected override void OnPreviewTextInput(TextCompositionEventArgs e)
        {
            for (int i = 0; i < e.Text.Length; i++)
            {
                managedCefBrowserAdapter.SendKeyEvent((int)WM.CHAR, (int)e.Text[i], 0); // or WM.IME_CHAR?
            }
            base.OnPreviewTextInput(e); // maybe remove this?
        }

... to the ChromiumWebBrowser class in the CefSharp.Wpf project?

[amaitland]

@jornh Worth trying in cefclient with OSR?

[jornh]

@amaitland good idea! It fails too.

It's already reported in this CEF Forum post and CEF issue 1019 vote for it there with a ⭐

[wangan]

It perform good when i input chinese language ,but when i input a single alphabet it become twice.
Like this:

[jornh]

@wangan great 😄 at least that's one small step...

Comment out the case WM.CHAR: line here then https://github.com/cefsharp/CefSharp/blob/v33.1.0-pre01/CefSharp.Wpf/ChromiumWebBrowser.cs#L595

As the issue is already reported upstream I'd prefer those who need this quick work-around hack apply it locally and vote for the CEF issue mentioned above (or maybe even submit a patch to CEF! The issue links to a similar patch for Mac - so I guess it shouldn't be to hard to implement for those who know about input method APIs ... ) then we don't need to do anything in CefSharp when the issue is resolved upstream.

[ralphmayr]

@jornh We have the same issue running CefSharp 37 (the prerelease, to be precise). The fix you proposed definitely resolves the issue for us, but we would prefer switching to the CefSharp 37 release as soon as this is out instead of building it locally including that change.
Do you see any chance to incorporate your fix in CefSharp 37?

[ssdyz]

Is this problem solved? Very worried, please do me a favor, thank you

[amaitland]

Updating link to cef bitbucket site https://bitbucket.org/chromiumembedded/cef/issue/1019

Issue is still unsolved, you can try the workaround proposed above.

[ralphmayr]

I created a PR (#934) that contains the fix proposed in this issue - as mentioned before, I'm confident that this fixed the issue for most cases.
We'd be very grateful if this would make it into the next CefSharp release ;)

[amaitland]

So the upstream issue has been marked as closed
https://bitbucket.org/chromiumembedded/cef/issues/1019

Anyone care to take the current master for a spin and see how it goes? (Will of course have to comment out https://github.com/cefsharp/CefSharp/blob/master/CefSharp.Wpf.Example/Views/BrowserTabView.xaml.cs#L30)

[amaitland]

I've removed the workaround from master see c7c9058

As the upstream issue has been resolved I'm closing this. (If someone can still reproduce the problem with latest master then this can be reopened).

[luciusli]

I can still reproduce this problem. FYI cefclient build 2454 from cefbuilds.com works flawlessly.

[amaitland]

FYI cefclient build 2454 from cefbuilds.com works flawlessly.

Just confirming that you ran cefclient with the --off-screen-rendering-enabled command line argument?

[luciusli]

I didn't but if run with that argument, the character selection box is misaligned.

[amaitland]

WPF uses off screen rendering, without that argument it behaves like the WinForms version.

If the problem still persists then someone with a vested interest in IME will have to troubleshoot the issue.

[amaitland]

Looks like the problem still exists, rather than multiple issues, closing this one in favor of #1262