For conforming UI Events spec, KeymapWrapper::InitKeyEvent() should initialize
mKeyCode and mKeyNameIndex with NS_VK_PROCESSKEY and KEY_NAME_INDEX_Process if
given keyboard event has already been handled by IME.
For making it know if given keyboard event has been handled by IME, this patch
adds additional bool argument to it and its callers.
Note that this patch changes keyCode value and key value of "keydown" event if
it's fired before "compositionstart" since Chromium does so on Linux.
MozReview-Commit-ID: FC3tfyeeopU
For conforming UI Events spec, KeymapWrapper::InitKeyEvent() should initialize
mKeyCode and mKeyNameIndex with NS_VK_PROCESSKEY and KEY_NAME_INDEX_Process if
given keyboard event has already been handled by IME.
For making it know if given keyboard event has been handled by IME, this patch
adds additional bool argument to it and its callers.
Note that this patch changes keyCode value and key value of "keydown" event if
it's fired before "compositionstart" since Chromium does so on Linux.
MozReview-Commit-ID: FC3tfyeeopU
Gecko decides keyCode from an ASCII character which is produced by the key
by itself or with Shift on active keyboard layout or alternative ASCII capable
keyboard layout if active keyboard layout isn't ASCII capable. However, we've
ignored alternative ASCII capable keyboard layout's character if both the
key itself and with Shift don't produce ASCII alphabet nor ASCII numeral,
i.e., ASCII punctuation characters are not used in alternative ASCII capable
keyboard layout because of avoiding mapping a keyCode value to 2 or more keys.
However, setting 0 to keyCode value makes Firefox unusable with some web
applications which are aware of neither KeyboardEvent.key nor
KeyboardEvent.code. So, even if we map same keyCode value to a key, we should
avoid setting keyCode value to 0 as far as possible.
This patch's approach is, we behave same keyCode value as the alternative ASCII
capable keyCode is selected when computed keyCode value of active keyboard
layout is 0. This means that we will make some language users whose keyboard
layout for their language is not ASCII capable can use global web services
which support US keyboard layout of Firefox since the new keyCode values
are mostly computed with US layout on Windows or actual alternative ASCII
capable keyboard layout on macOS and Linux. In other words, we cannot improve
compatibility with web applications which don't support Firefox by this patch
since our keyCode values are really different from Chrome's. So, unfortunately,
if we'd use exactly same keyCode computation as Chromium, we'd break
compatibility with existing web applications which are aware of Firefox since
it's necessary to check UA name or something before using keyCode values.
Note that the most important difference between Windows and the others is,
such keyCode value is computed with alternative ASCII capable keyboard
layout on macOS and Linux but only on Windows, it's computed with OEM virtual
keycode. This means that only on Windows, the keyCode value may be different
from actual alternative ASCII capable keyboard layout's keyCode.
MozReview-Commit-ID: As289r9wp6i
Shift+F10 is also well-known shortcut key on Linux. So, it should behave same as pressing ContextMenu key. So, for allowing web page to prevent its default, nsWindow for GTK needs to consume Shift key state at dispatching eContextMenu key.
Additionally, we should allow to open context menu with Shift+ContextMenu because only ContextMenu key press can be prevented its default by web page. Therefore, we should allow users to open context menu even with keyboard even if web content doesn't want it.
Note that Ctrl+Shift+F10 or Alt+Shift+F10 should behave same as Shift+ContextMenu key, but we should discuss later.
MozReview-Commit-ID: 1mPGKMTsrkv
Using direction-changed signal, we detect keyboard change for bidi.
When system uses fcitx's IM and ibus's arabic keyboard layout, this signal might fire often when switching layout and gdk_keymap_get_direction might return invalid bidi information. But I think that this is rare issue. Most users don't use Firefox Arabic version (it means that bidi.browser.ui = true) with ibus Arabic layout and fcitx CJK IM. Since there is no GTK3 API to get current IM module, I cannot find workaround for this.
MozReview-Commit-ID: DL8uUXJFWYz
