Implement outline view mode (#401)

* Created wasm binding to action's of the radio buttons which control the view mode
Added entry to DocumentMessage Enum

* draw in wireframe mode by changing parameters on each shape
added functions/changed behavior to do as above
not working yet
   - newly added shapes should be drawn in wireframe
   - setting fill to "none" on a path does not only draw an outline
      - maybe the stroke width is 0?

* Wire frame view mostly functional for ellipses
   - Need to implement for all shapes
   - BUG: shapes don't immediatley update upon changing view-mode

* Fixed: active document now updates after view mode swap

* The Pros:
   - wire frame mode effects all shapes correctly

The Cons:
   - wire frame mode effects everything, including things that maybe shouldn't be, like select boxes and pen lines

* wire frame view no longer effects overlay layers

* Fixed: While in wireframe view the pen tool will draw regular thickness lines.

* some commenting

* Fixed potential bug:
   In layer/file system with a Folder layer with a sub-layer that is also
   a Folder cache_dirty must be set in order for all shapes to update properly

* refactored code to use ViewMode enum names throughout

* Changed: All wireframe lines are blank
cargo fmt

* Wireframe thickness doesn't change as a result of zooming
   - Added DocumentMessage::ReRenderDocument, which marks layers as dirty and renders with the updated render-string
   - All "zoom" messages in the movement_handler send a re-render message
   - while in wireframe view, the "render-transform" of all shapes includes the root layer transform

Added getter/setter methods for graphene::Document::view_mode

* cargo fmt

* wireframe now has proper thickness after "Zoom Canvas to Fit all" action

* Refactored
   - Changed FrontendMessage::UpdateCanvas to RenderDocument message to allow for lazy evaluation
   - Created DocumentOperation::SetViewMode to be more consistent with existing code
   - removed log statement
   - Added constants for empty fill and thin-black stroke

* cargo fmt

* Removed ReRenderDocument message

* cargo fmt

* Fixes as suggested by TrueDoctor

* clean up merge
cargo fmt

* Refactor:
   moved view_mode to DocumentMessageHandler

* Polishing

* changed those two comments

* Remove unknown todo comment

Co-authored-by: Keavon Chambers <keavon@keavon.com>

editor/src/document/movement_handler.rs

@@ -1,16 +1,15 @@
-pub use super::layer_panel::*;
-
-use super::LayerData;
-
+pub use crate::document::layer_panel::*;
+use crate::document::{DocumentMessage, LayerData};
 use crate::message_prelude::*;
 use crate::{
 	consts::{VIEWPORT_SCROLL_RATE, VIEWPORT_ZOOM_LEVELS, VIEWPORT_ZOOM_MOUSE_RATE, VIEWPORT_ZOOM_SCALE_MAX, VIEWPORT_ZOOM_SCALE_MIN, VIEWPORT_ZOOM_WHEEL_RATE},
 	input::{mouse::ViewportBounds, mouse::ViewportPosition, InputPreprocessor},
 };
-use glam::DVec2;
 use graphene::document::Document;
+use graphene::layers::style::ViewMode;
 use graphene::Operation as DocumentOperation;
 
+use glam::DVec2;
 use serde::{Deserialize, Serialize};
 use std::collections::VecDeque;
 
@@ -132,21 +131,27 @@ impl MessageHandler<MovementMessage, (&mut LayerData, &Document, &InputPreproces
 				layerdata.scale = new.clamp(VIEWPORT_ZOOM_SCALE_MIN, VIEWPORT_ZOOM_SCALE_MAX);
 				responses.push_back(FrontendMessage::SetCanvasZoom { new_zoom: layerdata.scale }.into());
 				responses.push_back(ToolMessage::SelectedLayersChanged.into());
+				responses.push_back(DocumentMessage::DirtyRenderDocumentInOutlineView.into());
 				self.create_document_transform_from_layerdata(layerdata, &ipp.viewport_bounds, responses);
 			}
 			IncreaseCanvasZoom => {
+				// TODO: Eliminate redundant code by making this call SetCanvasZoom
 				layerdata.scale = *VIEWPORT_ZOOM_LEVELS.iter().find(|scale| **scale > layerdata.scale).unwrap_or(&layerdata.scale);
 				responses.push_back(FrontendMessage::SetCanvasZoom { new_zoom: layerdata.scale }.into());
 				responses.push_back(ToolMessage::SelectedLayersChanged.into());
+				responses.push_back(DocumentMessage::DirtyRenderDocumentInOutlineView.into());
 				self.create_document_transform_from_layerdata(layerdata, &ipp.viewport_bounds, responses);
 			}
 			DecreaseCanvasZoom => {
+				// TODO: Eliminate redundant code by making this call SetCanvasZoom
 				layerdata.scale = *VIEWPORT_ZOOM_LEVELS.iter().rev().find(|scale| **scale < layerdata.scale).unwrap_or(&layerdata.scale);
 				responses.push_back(FrontendMessage::SetCanvasZoom { new_zoom: layerdata.scale }.into());
 				responses.push_back(ToolMessage::SelectedLayersChanged.into());
+				responses.push_back(DocumentMessage::DirtyRenderDocumentInOutlineView.into());
 				self.create_document_transform_from_layerdata(layerdata, &ipp.viewport_bounds, responses);
 			}
 			WheelCanvasZoom => {
+				// TODO: Eliminate redundant code by making this call SetCanvasZoom
 				let scroll = ipp.mouse.scroll_delta.scroll_delta();
 				let mouse = ipp.mouse.position;
 				let viewport_bounds = ipp.viewport_bounds.size();
@@ -165,6 +170,7 @@ impl MessageHandler<MovementMessage, (&mut LayerData, &Document, &InputPreproces
 				layerdata.translation += transformed_delta;
 				responses.push_back(FrontendMessage::SetCanvasZoom { new_zoom: layerdata.scale }.into());
 				responses.push_back(ToolMessage::SelectedLayersChanged.into());
+				responses.push_back(DocumentMessage::DirtyRenderDocumentInOutlineView.into());
 				self.create_document_transform_from_layerdata(layerdata, &ipp.viewport_bounds, responses);
 			}
 			WheelCanvasTranslate { use_y_as_x } => {
@@ -199,6 +205,7 @@ impl MessageHandler<MovementMessage, (&mut LayerData, &Document, &InputPreproces
 					layerdata.scale *= new_scale;
 					responses.push_back(FrontendMessage::SetCanvasZoom { new_zoom: layerdata.scale }.into());
 					responses.push_back(ToolMessage::SelectedLayersChanged.into());
+					responses.push_back(DocumentMessage::DirtyRenderDocumentInOutlineView.into());
 					self.create_document_transform_from_layerdata(layerdata, &ipp.viewport_bounds, responses);
 				}
 			}