Add embedable images (#564)

* Add embedable bitmaps

* Initial work on blob urls

* Finish implementing data url

* Fix some bugs

* Rename bitmap to image

* Fix loading image on document load

* Add transform properties for image

* Remove some logging

* Add image dimensions

* Implement system copy and paste

* Fix pasting images

* Fix test

* Address code review

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

editor/src/frontend/frontend_message.rs

@@ -1,4 +1,4 @@
-use super::utility_types::{FrontendDocumentDetails, MouseCursorIcon};
+use super::utility_types::{FrontendDocumentDetails, FrontendImageData, MouseCursorIcon};
 use crate::document::layer_panel::{LayerPanelEntry, RawBuffer};
 use crate::layout::layout_message::LayoutTarget;
 use crate::layout::widgets::SubLayout;
@@ -29,6 +29,7 @@ pub enum FrontendMessage {
 	TriggerIndexedDbRemoveDocument { document_id: u64 },
 	TriggerIndexedDbWriteDocument { document: String, details: FrontendDocumentDetails, version: String },
 	TriggerTextCommit,
+	TriggerTextCopy { copy_text: String },
 	TriggerViewportResize,
 
 	// Update prefix: give the frontend a new value or state for it to use
@@ -43,6 +44,7 @@ pub enum FrontendMessage {
 	UpdateDocumentOverlays { svg: String },
 	UpdateDocumentRulers { origin: (f64, f64), spacing: f64, interval: f64 },
 	UpdateDocumentScrollbars { position: (f64, f64), size: (f64, f64), multiplier: (f64, f64) },
+	UpdateImageData { image_data: Vec<FrontendImageData> },
 	UpdateInputHints { hint_data: HintData },
 	UpdateMouseCursor { cursor: MouseCursorIcon },
 	UpdateOpenDocumentsList { open_documents: Vec<FrontendDocumentDetails> },

editor/src/frontend/utility_types.rs

@@ -1,3 +1,4 @@
+use graphene::LayerId;
 use serde::{Deserialize, Serialize};
 
 #[derive(PartialEq, Clone, Deserialize, Serialize, Debug)]
@@ -7,6 +8,13 @@ pub struct FrontendDocumentDetails {
 	pub id: u64,
 }
 
+#[derive(PartialEq, Clone, Deserialize, Serialize, Debug)]
+pub struct FrontendImageData {
+	pub path: Vec<LayerId>,
+	pub mime: String,
+	pub image_data: Vec<u8>,
+}
+
 #[derive(Clone, Copy, Debug, Eq, Deserialize, PartialEq, Serialize)]
 pub enum MouseCursorIcon {
 	Default,