The binding uses the `!important` selector to ensure that the editor
always gets a chance to clear multiple selections before other bindings
for escape are processed.
Just like the cursor clears its goal column when it is moved in any
way other than vertically, the selection clears its goal range (the
range it will attempt to use when adding a selection below) when it
is changed in any way.
Previously, if a selection was added and removed before the editor got
a chance to update its display, it would try to add a selection view
for the destroyed selection. Now we check the new selections and
cursors to make sure they aren't destroyed before we add views for
them.
Just like the cursor tries to stay in its "goal column" when moving
vertically, here we try to keep the same selection even when adding
across shorter lines.
This required changing text-buffer to support having a
path but not underlying file that exists yet.
Now calling RootView.open() with a non-existed path will
open a dirty empty editor to the path and the file will be
created on first save.
Previously EditSession.backspaceToBeginningOfLine() would do nothing
if at the beginning of the line.
Now it selects left and does a delete so it can be used to delete
multiple lines continuously without having to move the cursor.
Refs #134
When the grammar changes, spell check will detect this and toggle
itself accordingly. Before a grammar matches a buffer, it has the
NullGrammar, which won't be spell-checked.
Previously, logic associated with swapping grammars was a bit
scattered. Now grammar reloading / assignment methods delegate to
LanguageMode directly, and it emits a 'grammar-changed' event when
the grammar changes. Now EditSession and TokenizedBuffer listen for
this event and perform necessary actions for grammar change.
Previously the command panel would shrink when a path was
collapsed since operations that hadn't been rendered yet weren't
properly added to the DOM.
This removes the collapse/expand animation since it becomes jittery
when combined with rendering new path and operation views.
