dont exit poll() when ime composing

[shiren]

related #1823

we have problem when composing korean because poll() method keep exit when korean first letter composing in IE11

IE11 make selection when korean letter is composing(we need several key type to make one letter)

I think this maybe solution

how about this?

[marijnh]

Could you describe the problem that is occurring a bit more precisely?

[shiren]

ok sorry about my english

I'll show you with gif animation

below is right situation

when i type keyboard button "ㅇ"

we need poll() "ㅇ" and applyTextInput so editor should render "ㅇ"

then i type keyboard button "ㅏ"

we need poll() "아" and applyTextinput so editor should render "아"

then i type keyboard button "ㄴ"

we need poll() "안" and applyTextinput so editor should render "안"

so we can get complete one letter "안"

but IE 11 / window7 dont show first letter so when we want to input "안녕"

cm dont render "안" until "녕" composition start

show below

this because

poll: function() {
      var cm = this.cm, input = this.textarea, prevInput = this.prevInput;
      // Since this is called a *lot*, try to bail out as cheaply as
      // possible when it is clear that nothing happened. hasSelection
      // will be the case when there is a lot of text in the textarea,
      // in which case reading its value would be expensive.
      if (this.contextMenuPending || !cm.state.focused ||
          (hasSelection(input) && !prevInput) ||
          isReadOnly(cm) || cm.options.disableInput || cm.state.keySeq)
        return false;

(hasSelection(input) && !prevInput)

that condition cancel polling "ㅇ" -> "아" -> "안"

so we can't see "ㅇ" -> "아" -> "안"

i hope that this comment can help

[marijnh]

That makes sense. Merged as 76582ee