Get undo/redo working

src/containers/paint-editor.jsx

@@ -1,5 +1,6 @@
 import paper from '@scratch/paper';
 import PropTypes from 'prop-types';
+
 import React from 'react';
 import PaintEditorComponent from '../components/paint-editor/paint-editor.jsx';
 
@@ -11,7 +12,8 @@ import {deactivateEyeDropper} from '../reducers/eye-dropper';
 import {setTextEditTarget} from '../reducers/text-edit-target';
 import {updateViewBounds} from '../reducers/view-bounds';
 
-import {hideGuideLayers, showGuideLayers} from '../helper/layer';
+import {getRaster, hideGuideLayers, showGuideLayers} from '../helper/layer';
+import {trim} from '../helper/bitmap';
 import {performUndo, performRedo, performSnapshot, shouldShowUndo, shouldShowRedo} from '../helper/undo';
 import {bringToFront, sendBackward, sendToBack, bringForward} from '../helper/order';
 import {groupSelection, ungroupSelection} from '../helper/group';
@@ -90,9 +92,20 @@ class PaintEditor extends React.Component {
         const oldCenter = paper.project.view.center.clone();
         resetZoom();
 
-        const guideLayers = hideGuideLayers();
+        let raster;
+        if (this.props.format === Formats.BITMAP) {
+            // @todo export bitmap here
+            raster = trim(getRaster());
+            if (raster.width === 0 || raster.height === 0) {
+                raster.remove();
+            } else {
+                paper.project.activeLayer.addChild(raster);
+            }
+        }
         
+        const guideLayers = hideGuideLayers(true /* includeRaster */);
         const bounds = paper.project.activeLayer.bounds;
+
         this.props.onUpdateSvg(
             paper.project.exportSVG({
                 asString: true,
@@ -108,6 +121,8 @@ class PaintEditor extends React.Component {
             performSnapshot(this.props.undoSnapshot);
         }
 
+        if (raster) raster.remove();
+
         // Restore old zoom
         paper.project.view.zoom = oldZoom;
         paper.project.view.center = oldCenter;

src/containers/paper-canvas.jsx

@@ -79,15 +79,17 @@ class PaperCanvas extends React.Component {
         }
     }
     convertToBitmap () {
+        this.props.clearSelectedItems();
         const raster = paper.project.activeLayer.rasterize(72, false /* insert */);
         raster.onLoad = function () {
             const subCanvas = raster.canvas;
             getRaster().drawImage(subCanvas, raster.bounds.topLeft);
-        };
-        paper.project.activeLayer.removeChildren();
-        performSnapshot(this.props.undoSnapshot);
+            paper.project.activeLayer.removeChildren();
+            this.props.onUpdateSvg();
+        }.bind(this);
     }
     convertToVector () {
+        this.props.clearSelectedItems();
         const raster = trim(getRaster());
         if (raster.width === 0 || raster.height === 0) {
             raster.remove();
@@ -95,7 +97,7 @@ class PaperCanvas extends React.Component {
             paper.project.activeLayer.addChild(raster);
         }
         clearRaster();
-        performSnapshot(this.props.undoSnapshot);
+        this.props.onUpdateSvg();
     }
     switchCostume (svg, rotationCenterX, rotationCenterY) {
         for (const layer of paper.project.layers) {

src/helper/layer.js

@@ -9,7 +9,6 @@ const _getLayer = function (layerString) {
             return layer;
         }
     }
-    log.error(`Didn't find layer ${layerString}`);
 };
 
 const _getPaintingLayer = function () {
@@ -36,22 +35,40 @@ const _getBackgroundGuideLayer = function () {
     return _getLayer('isBackgroundGuideLayer');
 };
 
+const _makeGuideLayer = function () {
+    const guideLayer = new paper.Layer();
+    guideLayer.data.isGuideLayer = true;
+    return guideLayer;
+};
+
 const getGuideLayer = function () {
-    return _getLayer('isGuideLayer');
+    let layer = _getLayer('isGuideLayer');
+    if (!layer) {
+        layer = _makeGuideLayer();
+        _getPaintingLayer().activate();
+    }
+    return layer;
 };
 
 /**
  * Removes the guide layers, e.g. for purposes of exporting the image. Must call showGuideLayers to re-add them.
+ * @param {boolean} includeRaster true if the raster layer should also be hidden
  * @return {object} an object of the removed layers, which should be passed to showGuideLayers to re-add them.
  */
-const hideGuideLayers = function () {
+const hideGuideLayers = function (includeRaster) {
     const backgroundGuideLayer = _getBackgroundGuideLayer();
     const guideLayer = getGuideLayer();
     guideLayer.remove();
     backgroundGuideLayer.remove();
+    let rasterLayer;
+    if (includeRaster) {
+        rasterLayer = _getLayer('isRasterLayer');
+        rasterLayer.remove();
+    }
     return {
         guideLayer: guideLayer,
-        backgroundGuideLayer: backgroundGuideLayer
+        backgroundGuideLayer: backgroundGuideLayer,
+        rasterLayer: rasterLayer
     };
 };
 
@@ -63,6 +80,11 @@ const hideGuideLayers = function () {
 const showGuideLayers = function (guideLayers) {
     const backgroundGuideLayer = guideLayers.backgroundGuideLayer;
     const guideLayer = guideLayers.guideLayer;
+    const rasterLayer = guideLayers.rasterLayer;
+    if (rasterLayer && !rasterLayer.index) {
+        paper.project.addLayer(rasterLayer);
+        rasterLayer.sendToBack();
+    }
     if (!backgroundGuideLayer.index) {
         paper.project.addLayer(backgroundGuideLayer);
         backgroundGuideLayer.sendToBack();
@@ -77,12 +99,6 @@ const showGuideLayers = function (guideLayers) {
     }
 };
 
-const _makeGuideLayer = function () {
-    const guideLayer = new paper.Layer();
-    guideLayer.data.isGuideLayer = true;
-    return guideLayer;
-};
-
 const _makePaintingLayer = function () {
     const paintingLayer = new paper.Layer();
     paintingLayer.data.isPaintingLayer = true;

src/helper/selection-tools/bounding-box-tool.js

@@ -54,7 +54,7 @@ class BoundingBoxTool {
      * @param {Array<paper.Item>} selectedItems Array of selected items.
      */
     onSelectionChanged (selectedItems) {
-        if (selectedItems) {
+        if (selectedItems && selectedItems.length) {
             this.setSelectionBounds();
         } else {
             this.removeBoundsPath();

src/helper/undo.js

@@ -1,7 +1,7 @@
 // undo functionality
 // modifed from https://github.com/memononen/stylii
 import paper from '@scratch/paper';
-import {hideGuideLayers, showGuideLayers} from '../helper/layer';
+import {hideGuideLayers, showGuideLayers, getRaster} from '../helper/layer';
 
 const performSnapshot = function (dispatchPerformSnapshot) {
     const guideLayers = hideGuideLayers();
@@ -12,7 +12,8 @@ const performSnapshot = function (dispatchPerformSnapshot) {
 };
 
 const _restore = function (entry, setSelectedItems, onUpdateSvg) {
-    for (const layer of paper.project.layers) {
+    for (let i = paper.project.layers.length - 1; i >= 0; i--) {
+        const layer = paper.project.layers[i];
         if (!layer.data.isBackgroundGuideLayer) {
             layer.removeChildren();
             layer.remove();
@@ -21,7 +22,12 @@ const _restore = function (entry, setSelectedItems, onUpdateSvg) {
     paper.project.importJSON(entry.json);
 
     setSelectedItems();
-    onUpdateSvg(true /* skipSnapshot */);
+    getRaster().onLoad = function () {
+        onUpdateSvg(true /* skipSnapshot */);
+    };
+    if (getRaster().loaded) {
+        getRaster().onLoad();
+    }
 };
 
 const performUndo = function (undoState, dispatchPerformUndo, setSelectedItems, onUpdateSvg) {