Different from the comment in `EditorCommands.h`, editing commands and
editor commands are instantiated for each editable document or each
`HTMLInputElement` or `HTMLTextareaElement`. Therefore, even though they
are stateless, we allocate too many instances of them. We should make
them singleton classes to reduce the footprint and save runtime allocation
cost.
Differential Revision: https://phabricator.services.mozilla.com/D27406
--HG--
extra : moz-landing-system : lando
`nsIControllerCommandTable` isn't implemented with JS even in comm-central nor
BlueGriffon. Therefore, we can make it a builtinclass.
Additionally, it's inherited only by nsControllerCommandTable. So, all users
in C++ can treat the concrete class directly.
Differential Revision: https://phabricator.services.mozilla.com/D25727
--HG--
extra : moz-landing-system : lando
"cmd_copyAndCollapseToEnd" is referred only by CopyPasteAssistent (even
including comm-central and BlueGriffon), but CopyPasteAssistent won't receive
"copy" command to send it.
So, it seems that we can get rid of a lot around CopyPasteAssistent but this
patch just changes the mapping in it ("copy" is mapped to "cmd_copy") and
removes command handlers of "cmd_copyAndCollapseToEnd" completely.
Differential Revision: https://phabricator.services.mozilla.com/D20612
--HG--
extra : moz-landing-system : lando
"cmd_clearUndo" is never used now (even including comm-central and BlueGriffon).
So, we can stop supporting this command and we can get rid of the command
handler, ClearUndoCommand.
Differential Revision: https://phabricator.services.mozilla.com/D20610
--HG--
extra : moz-landing-system : lando
Previously we supported insertParagraph as a synonym for formatBlock
"p", which is both useless and incompatible with all other browsers.
Edge's behavior doesn't look useful and looks redundant with insertHTML
(although it matches the name nicely, probably because they invented
the command). Blink/WebKit treat it the same as hitting Enter, which is
useful for cross-browser testing until we get synthesizeKey() in wpt.
At the same time, I added insertLineBreak, which Blink/WebKit support
with the same functionality as pressing Shift-Enter.
The new event.html failures are spurious -- we used to pass by mistake
because we didn't support insertlinebreak at all. insertlinebreak.html
has only new passes, no new failures, although it's not clear on the
diff.
MozReview-Commit-ID: 16oPcxXwGcj
Masayuki Nakano
Sylvestre Ledru
Aryeh Gregor