* Refactor: simplify linear element type
* Refactor: dedupe scrollbar handling
* First step towards binding - establish relationship and basic test for dragged lines
* Refactor: use zoom from appstate
* Refactor: generalize getElementAtPosition
* Only consider bindable elements in hit test
* Refactor: pull out pieces of hit test for reuse later
* Refactor: pull out diamond from hit test for reuse later
* Refactor: pull out text from hit test for reuse later
* Suggest binding when hovering
* Give shapes in regression test real size
* Give shapes in undo/redo test real size
* Keep bound element highlighted
* Show binding suggestion for multi-point elements
* Move binding to its on module with functions so that I can use it from actions, add support for binding end of multi-point elements
* Use Id instead of ID
* Improve boundary offset for non-squarish elements
* Fix localStorage for binding on linear elements
* Simplify dragging code and fix elements bound twice to the same shape
* Fix binding for rectangles
* Bind both ends at the end of the linear element creation, needed for focus points
* wip
* Refactor: Renames and reshapes for next commit
* Calculate and store focus points and gaps, but dont use them yet
* Focus points for rectangles
* Dont blow up when canceling linear element
* Stop suggesting binding when a non-compatible tool is selected
* Clean up collision code
* Using Geometric Algebra for hit tests
* Correct binding for all shapes
* Constant gap around polygon corners
* Fix rotation handling
* Generalize update and fix hit test for rotated elements
* Handle rotation realtime
* Handle scaling
* Remove vibration when moving bound and binding element together
* Handle simultenous scaling
* Allow binding and unbinding when editing linear elements
* Dont delete binding when the end point wasnt touched
* Bind on enter/escape when editing
* Support multiple suggested bindable elements in preparation for supporting linear elements dragging
* Update binding when moving linear elements
* Update binding when resizing linear elements
* Dont re-render UI on binding hints
* Update both ends when one is moved
* Use distance instead of focus point for binding
* Complicated approach for posterity, ignore this commit
* Revert the complicated approach
* Better focus point strategy, working for all shapes
* Update snapshots
* Dont break binding gap when mirroring shape
* Dont break binding gap when grid mode pushes it inside
* Dont bind draw elements
* Support alt duplication
* Fix alt duplication to
* Support cmd+D duplication
* All copy mechanisms are supported
* Allow binding shapes to arrows, having arrows created first
* Prevent arrows from disappearing for ellipses
* Better binding suggestion highlight for shapes
* Dont suggest second binding for simple elements when editing or moving them
* Dont steal already bound linear elements when moving shapes
* Fix highlighting diamonds and more precisely highlight other shapes
* Highlight linear element edges for binding
* Highlight text binding too
* Handle deletion
* Dont suggest second binding for simple linear elements when creating them
* Dont highlight bound element during creation
* Fix binding for rotated linear elements
* Fix collision check for ellipses
* Dont show suggested bindings for selected pairs
* Bind multi-point linear elements when the tool is switched - important for mobile
* Handle unbinding one of two bound edges correctly
* Rename boundElement in state to startBoundElement
* Dont double account for zoom when rendering binding highlight
* Fix rendering of edited linear element point handles
* Suggest binding when adding new point to a linear element
* Bind when adding a new point to a linear element and dont unbind when moving middle elements
* Handle deleting points
* Add cmd modifier key to disable binding
* Use state for enabling binding, fix not binding for linear elements during creation
* Drop support for binding lines, only arrows are bindable
* Reset binding mode on blur
* Fix not binding lines
* Refactor: use pointer down state for alt duplication flag
* Refactor: use pointer down state for drag state
* Refactor: simplify over scrollbars check
* Refactor: move pointer move handler out of pointer down handler
* Refactor: move pointer up handler out of pointer down handler
* Refactor: further simplify scrollbar check state in pointer down event
* Refactor: pull out initial pointer down state creation
* Refactor: introduce pointer down state to replace implicit closure state with an explicit object
* Refactor: use pointer down state for resize handle
* Refactor: use pointer down state for isResizing
* Refactor: use pointer down state for resizing offset
* Refactor: use pointer down state for hit element
* Refactor: move selection handling out of pointer down event handler
* Refactor: move text handling out of pointer down event handler
* Refactor: move linear tools handling out of pointer down event handler
* Refactor: move element creation out of pointer down handler
* Refactor: Move context menu touch device handling
* Refactor: Move more stuff out of pointer down
* Refactor: Move last coords into an object
* Refactor: Move scrollbar handling out of pointer down
* Refactor: simplify resizing in pointer down
* Refactor: further simplify resizing in pointer down
* Refactor: clarify clearing selection code
* Refactor: move out clearing selection from pointer down
* Refactor: further simplify deselection in pointer down
