This moves observation of the config keys to Editor, which assigns the
invisibles hash or null on the TokenizedBuffer via the DisplayBuffer to
control whether we render invisibles or not.
This commit also extends config.get to merge default values into the
returned object if both the assigned and default values are objects.
This allows 'atom.invisibles' to be treated as an object that always has
the default values filled in.
Per the discussion with @kevinsawicki in #3168, I have added a config
option `editor.confirmCheckoutHead` that defaults to `true`. When the
`editor:checkout-head-revision` command is executed, a confirmation
dialog now shows that states which file is to be reverted and asks the
user to "Revert" or "Cancel". If the config option is set to `false`,
the old behavior, simply reverting without prompting, is used.
I also added tests to ensure that the confirmation dialog is displayed
or not in the right configurations.
Check enabled names against the bundled names and ensure
one bundled UI and one bundled syntax theme are enabled,
defaulting to the dark themes when necessary.
Previously, each editor observed font-related config values on its own
and applied inline styles to honor them. This made it difficult to style
the editor like a normal element with CSS.
Moving this to a global stylesheet that targets editors via the .editor
selector means that the font size setting can be overridden in specific
contexts, such as when using mini editors.
In Chrome 31, setImmediate was yielding better behavior. But now Chrome
35 seems to behave more smoothly when we use requestAnimationFrame, and
the delay for keystrokes is non-existent.
We sample both the background color of the editor and the gutter. If the
gutter has an actual background color, we use it. Otherwise we fall back
to the same background as the editor.
This ensures lines have an opaque background that matches whatever the
editor is styled as, but avoids the need to apply the .editor-colors
class to the .lines div. That approach fell down when people were
setting the background color via means other than .editor-colors, such
as styling mini editors via the .editor.mini selector in the settings
view.
