Basic cut implementation

SelectionManager implmentaiton
Rectangular seleciton impl
Utils refacoring
Event manager refactoring
basic cut implmentation

js/selection/SelectionManager.js

@@ -0,0 +1,114 @@
+(function () {
+	var ns = $.namespace("pskl.selection");
+
+	
+	ns.SelectionManager = function (overlayFrame) {
+		
+		this.overlayFrame = overlayFrame;
+		
+		this.currentSelection = null;
+		this.currentFrame = null; 
+
+		
+		$.subscribe(Events.SELECTION_CREATED, $.proxy(this.onSelectionCreated_, this));
+
+
+		$.subscribe(Events.CURRENT_FRAME_SET, $.proxy(this.onCurrentFrameChanged_, this));
+
+		//$.subscribe(Events.PASTE, $.proxy(this.onPaste_, this));
+
+		$.subscribe(Events.COPY, $.proxy(this.onCopy_, this)););
+
+		$.subscribe(Events.CUT, $.proxy(this.onCut_, this));
+
+		$.subscribe(Events.TOOL_SELECTED); // discard selection if not move
+
+	};
+
+	ns.SelectionManager.prototype.hasSelection = function() {
+		return (this.currentSelection == null) ? false : true;
+	};
+
+	ns.SelectionManager.prototype.addSelection = function(selection) {
+		this.currentSelection = selection;
+	};
+
+	ns.SelectionManager.prototype.removeSelection = function(selection) {
+		this.currentSelection = null;
+	};
+
+	/**
+	 * @private
+	 */
+	ns.SelectionManager.prototype.onCurrentFrameChanged_ = function(evt, currentFrame) {
+		if(currentFrame) {
+			this.currentFrame = currentFrame;
+		}
+		else {
+			throw "Bad current frame set in SelectionManager";
+		}
+	};
+
+	/**
+	 * @private
+	 */
+	ns.SelectionManager.prototype.onCut_ = function(evt) {
+		if(this.currentSelection && this.currentFrame) {
+			var pixels = this.currentSelection.pixels;
+			for(var i=0, l=pixels.length; i<l; i++) {
+				this.currentFrame.setPixel(pixels[i].col, pixels[i].row, Constants.TRANSPARENT_COLOR);
+			}
+		}
+		else {
+			throw "Bad state for CUT callback in SelectionManager";
+		}
+	};
+
+	ns.SelectionManager.prototype.onPaste_ = function(evt) {
+		if(this.currentSelection && this.currentFrame) {
+			var pixels = this.currentSelection.pixels;
+			for(var i=0, l=pixels.length; i<l; i++) {
+				this.currentFrame.setPixel(pixels[i].col, pixels[i].row, Constants.TRANSPARENT_COLOR);
+			}
+		}
+		else {
+			throw "Bad state for CUT callback in SelectionManager";
+		}
+	};
+
+	/**
+	 * @private
+	 */
+	ns.SelectionManager.prototype.onCopy_ = function(evt) {
+		this.copiedPixels = [];
+		if(this.currentSelection && this.currentFrame) {
+			var pixels = this.currentSelection.pixels;
+			for(var i=0, l=pixels.length; i<l; i++) {
+				copiedPixels.push({
+					"col": pixels[i].col,
+					"row": pixels[i].row,
+					"color": this.currentFrame.getPixel(pixels[i].col, pixels[i].row)
+				});
+			}
+		}
+		else {
+			throw "Bad state for CUT callback in SelectionManager";
+		}
+	};
+
+	/**
+	 * @private
+	 */
+	ns.SelectionManager.prototype.onSelectionCreated_ = function(evt, selection) {
+		if(selection) {
+			this.currentSelection = selection;
+			var pixels = selection.pixels;
+			for(var i=0, l=pixels.length; i<l; i++) {
+				this.overlayFrame.setPixel(pixels[i].col, pixels[i].row, Constants.SELECTION_TRANSPARENT_COLOR);
+			}
+		}
+		else {
+			throw "Bad current selection set in SelectionManager";
+		}
+	};
+})();