WPF - IME Windows 8.1/10/11

[ay2015]

I use the project from official website and version '41.0.1' ,when I design a wonderful window,I have to set variable ''AllowsTransparency" to "true", “WindowStyle” to "None",I edited the ‘MainWindow.xaml’ ,set variable ''AllowsTransparency" to "true", “WindowStyle” to "None",and run.
the problem: input tag from html can't use other IME,but character is Ok，how can I solve it?
Thanks for you

[TyrWang]

https://bitbucket.org/chromiumembedded/cef/issues/1675/inline-ime-support-nstextinput-protocol-in
Seems they still working on it

[amaitland]

https://bitbucket.org/chromiumembedded/cef/issues/1675/inline-ime-support-nstextinput-protocol-in

I have created wrappers for the methods exposed see fdd0889 This takes care of the C++ step, now it's up to someone else to finish the implementation and map/forward the relevant WPF events. I know nothing about IME, I have not tested the changes, so make sure you double check they're mapped correctly. CEF includes an example of as part of https://bitbucket.org/chromiumembedded/cef/commits/f7014be

Please don't ask me questions about this as I've not used the new API methods, it's up to someone else to figure out. If you need to ask follow up questions about the CEF API do so at http://magpcss.org/ceforum/viewforum.php?f=6

[amaitland]

I intend to cleanup this issue, removing unnecessary comments and condensing the issue down to the relevant information for the current version. I will do this in roughly two weeks. If there are objections then I will close and lock this issue and create new issue that has only the relevant information and provide a link in this issue.

[karthikeyancdm]

Thank you, @billshinji
Please let me know the build number which has the fix for #3455, so that I can test it out.

[billshinji]

It is merged into the master so I expect you can test it on the next release (v89) if everything goes all right. Or you can download the master code files right now and build yourself. :-)

[karthikeyancdm]

Hi @billshinji
While testing this we found few issues which are listed below, it will be very helpful for us if you could fix those issues. Would you please help to fix them? Please.

Issue 1: When Japanese IME is used, the cursor position shifts before the first character when "space" is pressed to select words from dictionary. For e.g. set the Japanese IME to "Hiragana" and input "nihongo", then press "space", please observe that cursor moves before the string "日本語", cursor is expected to be placed after the string "日本語".

Issue 2: When cursor is placed before the string "日本語", try to move the cursor by pressing "right arrow key", the cursor is not moving to right.

Issue 3: If the "password field", we expect IME to be disabled, but IME is not getting disabled. So the characters we input in the password field are not correct (i.e. Hiragana is selected in the IME), because the IME converts the password characters to Japanese scripts and those characters are visible while typing password.

Some of these IME issues are noted while using Korean IME as well. Please let me know if you need more information on this regard.

[billshinji]

@karthikeyancdm
I will look into the problems and see if I can help :-)

[karthikeyancdm]

@billshinji
Could you help with the above problems with Japanese IME? Many thanks in advance!

[billshinji]

I have noticed the symptoms but I am in the middle of developing an important project at work. It should be done by the end of June. I hope I can spare some time before the middle of June though. NOT that I can fix those issues, :-) but I will try!

[billshinji]

@karthikeyancdm I've been digging the issue almost for a week now but frankly I am having a hard time struggling with Windows' IME APIs (called IMM). The subject is fairly new to me so I think it's better to 'learn' some basics of the API set first ... While I am doing these crazy trial-and-error things, I hope someone who is expert of IME may help resolve this issue for good. :-) Anyway I'll let you know if I manage to resolve the issues out of pure luck ... Thank you.

[igandrews]

I couldn't find any official documentation regarding the usage of the GCS_CURSORPOS but it seems like at least in WPF MS is ignoring that value and positioning at the end of the string if the neither the character before nor after the specified cursor position is a new character (by considering the attributes of the composition as gotten here). In the case of space the string is being replaced/changed. Technically they are setting their _caretOffset to -1 but elsewhere they are interpreting that as the end. So you could probably change where the IMEHandler gets the attributes and make a similar change?

[BigerXie]

browser.WpfKeyboardHandler = new CefSharp.Wpf.Experimental.WpfImeKeyboardHandler(browser);

Hi, I have used WpfImeKeyboardHandler in my project, I found if I invoke browser.reload(), my IME cannot switch between Chinese and English, Can you help me fix it?

[nameofSEOKWONHONG]

browser.WpfKeyboardHandler = new CefSharp.Wpf.Experimental.WpfImeKeyboardHandler(browser);

Hi. I am a Korean user. I set the handler and it worked perfectly.
Thanks for your efforts.

[amaitland]

@nameofSEOKWONHONG Thanks for the feedback.

[amaitland]

I was thinking we could default to the WpfImeKeyboardHandler when IME is detected in WPF.
Can anyone confirm the following works? Or if someone has a better suggestion please provide a code example.

if (InputMethod.Current.ImeState == InputMethodState.On)
{
    browser.WpfKeyboardHandler = new CefSharp.Wpf.Experimental.WpfImeKeyboardHandler(browser);
}

[igandrews]

The ImeState could change while the control has focus. If it matters I use the WpfImeKeyboardHandler always - set during construction - and haven't come across any issues with using it other than bugs in the IME handling. Which reminds me I found another issue and will submit a PR for it when I have some time.

[amaitland]

Thanks for the feedback. The intention would be to use the IME keyboard handler if appropriate for the current user (hope that makes sense)

[amaitland]

The intention would be to use the IME keyboard handler if appropriate for the current user (hope that makes sense)

PR #4439 is available for review/testing. Anyone interested please test and provide feedback.

[AntaresXXX]

Hello, I am a Chinese developer. I am testing with a Chinese IME, and it works fine. However, there is a minor flaw: when I press the first key, the IME popup box does not appear at the expected location, but instead, it appears at the bottom right corner. When the second key is pressed, the IME popup box returns to the correct position.

[igandrews]

Hello, I am a Chinese developer. I am testing with a Chinese IME, and it works fine. However, there is a minor flaw: when I press the first key, the IME popup box does not appear at the expected location, but instead, it appears at the bottom right corner. When the second key is pressed, the IME popup box returns to the correct position.

This isn't cefsharp or if it is it requires additional infrastructure in cef itself. I reported this to them a while back.