Current Dev State

static/js/ketcher2/script/editor/tool/eraser.js

@@ -0,0 +1,86 @@
+/****************************************************************************
+ * Copyright 2017 EPAM Systems
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ ***************************************************************************/
+
+var Action = require('../action');
+var LassoHelper = require('./helper/lasso');
+
+function EraserTool(editor, mode) {
+	if (!(this instanceof EraserTool)) {
+		if (!editor.selection())
+			return new EraserTool(editor, mode);
+
+		var action = Action.fromFragmentDeletion(editor.render.ctab, editor.selection());
+		editor.update(action);
+		editor.selection(null);
+		return null;
+	}
+
+	this.editor = editor;
+
+	this.maps = ['atoms', 'bonds', 'rxnArrows', 'rxnPluses', 'sgroups', 'sgroupData', 'chiralFlags'];
+	this.lassoHelper = new LassoHelper(mode || 0, editor);
+}
+
+EraserTool.prototype.mousedown = function (event) {
+	var ci = this.editor.findItem(event, this.maps);
+	if (!ci) //  ci.type == 'Canvas'
+		this.lassoHelper.begin(event);
+};
+
+EraserTool.prototype.mousemove = function (event) {
+	if (this.lassoHelper.running())
+		this.editor.selection(this.lassoHelper.addPoint(event));
+	else
+		this.editor.hover(this.editor.findItem(event, this.maps));
+};
+
+EraserTool.prototype.mouseleave = function (event) {
+	if (this.lassoHelper.running(event))
+		this.lassoHelper.end(event);
+};
+
+EraserTool.prototype.mouseup = function (event) { // eslint-disable-line max-statements
+	var rnd = this.editor.render;
+	if (this.lassoHelper.running()) { // TODO it catches more events than needed, to be re-factored
+		this.editor.update(Action.fromFragmentDeletion(rnd.ctab, this.lassoHelper.end(event)));
+		this.editor.selection(null);
+	} else {
+		var ci = this.editor.findItem(event, this.maps);
+		if (ci) { //  ci.type != 'Canvas'
+			this.editor.hover(null);
+			if (ci.map === 'atoms') {
+				this.editor.update(Action.fromAtomDeletion(rnd.ctab, ci.id));
+			} else if (ci.map === 'bonds') {
+				this.editor.update(Action.fromBondDeletion(rnd.ctab, ci.id));
+			} else if (ci.map === 'sgroups' || ci.map === 'sgroupData') {
+				this.editor.update(Action.fromSgroupDeletion(rnd.ctab, ci.id));
+			} else if (ci.map === 'rxnArrows') {
+				this.editor.update(Action.fromArrowDeletion(rnd.ctab, ci.id));
+			} else if (ci.map === 'rxnPluses') {
+				this.editor.update(Action.fromPlusDeletion(rnd.ctab, ci.id));
+			} else if (ci.map === 'chiralFlags') {
+				this.editor.update(Action.fromChiralFlagDeletion(rnd.ctab));
+			} else {
+				// TODO re-factoring needed - should be "map-independent"
+				console.error('EraserTool: unable to delete the object ' + ci.map + '[' + ci.id + ']');
+				return;
+			}
+			this.editor.selection(null);
+		}
+	}
+};
+
+module.exports = EraserTool;