Renamed Preview to FullscreenPreview to avoid confusion.
As an extra "to do", we need to add command aliases, so Preview matches
FullscreenPreview (mainly to keep user defined keyboard shortcuts).
Undoers were little objects to swap/revert an action. They didn't
execute the action itself, they just revert its previous state. Now
undoers were replaced with cmds: A cmd is an object that
executes/undoes/redoes just one action.
Changes:
* Remove old undo library and app/objects_container_impl.cpp
(now we use the doc::ObjectId directly to store undo info)
* Remove all Undoers from app/undoers/
* Replace DocumentApi impl with little Cmds in app/cmd/, these
cmds handle execute/undo/redo of each action at the logic layer
* Remove doc::Dirty object
* Remove doc::Settings: all undo configuration is in the app side
* Move undo options from app:ISettings to app::Preferences
* Rename UndoTransaction to Transaction
* Create a CmdSequence to store a sequence of Cmds (as now the new
undo library doesn't support open/close groups)
* Add doc::get<T>(ObjectId) function to get any kind of object
from the doc library by its ID
* Add Cel::document() and Sprite::document() members
* Add Sprite::cels(frame_t) to get all cels in the given frame
* Add Layer::displaceFrames() member function
* Move the "allow non-linear history" flag from undo2::UndoHistory
to app::DocumentUndo
Here we avoid copying and clearing pixels that will not be used
in the whole tool loop process.
Changes:
* Add several member functions in ToolLoop to validate/invalidate regions
of source/destination images so we know what regions are safe to use
by inks and can be shown in the editor
* Add new DocumentObserver::onExposeSpritePixels() member to validate
pixels that will be displayed in the editor
* Add Ink::needs/createSpecialSourceArea() member functions to validate
extra areas for inks like blur or jumble
* Add undoers::ModifiedRegion to save the undo information about the
modified region
* Add ShowHideDrawingCursor class
* Change "blur" tool policy from overlap to accumulate
(This is a real fix for issue #239)
Changes:
* Add KeyboardShortcutsCommand and window
* Add SelectAccelerator window
* Replace modules/gui.cpp functions with app::KeyboardShortcuts and
app::Key with the logic to load/save/handle keyboard shortcuts
* Change ui::Accelerator concept: now it represent just one keyboard
shortcut, not a set of shortcuts
* Remove ui::Accelerator from ui::MenuItem, now the key is associated
in app::AppMenuItem and it's a app::Key
* Add Command::onGetFriendlyName() to get a user friendly name of the
command depending on its parameters
